Arnold - Latlong Images and Light Filters

[Sumit Suri]

Hi Guys,

I am having trouble loading Latlong images in Gaffer/Arnold, any ideas how I can load an hdri (latlong) with the skydome light ?

Also Arnold Light Filters, I was able to get Light decay to work with Arnold lights but having trouble with

Gobo, Lightblockers and Barndoors to work.

any information will be helpful.

regards

Sumit

[Matti Grüner]

Hey Sumit,

Also Arnold Light Filters, I was able to get Light decay to work with Arnold lights but having trouble with
Gobo, Lightblockers and Barndoors to work.

Can you tell us what you tried? All of those filters should work exactly like the light decay in terms of how things get set up. A simple ShaderAssignment node that assigns the filter to the light should do the trick. 

Matti.

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[Sumit Suri]

Hi Matti,

I am able to assign these like decay filter using shader assignment, but

1. Barndoors - I guess parameters work between 0-1 (though I did try higher values too) but no effect visible in renders.

2. Gobos - I attached a .jpg image to gobo (slidemap) and connected the gobo to the shader assignment. but effect not visible in the renders. I have tried different maps too but the result is the same,

3. Blockers -  I attached a Light blocker using shader assignment. but no effect visible in renders. Also Geometry type - How can i place it in the scene at desired location and size. ?

Geometry Matrix - is this something that defines the placement of the blocker in the scene ?. how can I use this parameter ?

regards

Sumit

[Matti Grüner]

Hey Sumit,

apologies - I missed that you mentioned blockers, as well. Those will currently not work, but they are on my list of things to get to hopefully fairly soon.

The rest, however, should just work, I think. I will run some tests once I get into work. Which versions of Gaffer and Arnold are you using?

Thanks,

Matti.

[Matti Gruner]

Hey Sumit,

I've set up a simple demo box for you to look at. It works fine for me in Gaffer 0.51.0.1 and Arnold 5.1.1.0.

The box contains 3 lights affected by either a gobo, light_decay or barndoor node. Also note the visualizers in the viewport that should help with aligning things.

Please let me know if that doesn't work for you for some reason or if you have any other question. I'll work with our technical writer, Michael, to get something like this demo setup into our documentation so that we got that part of Gaffer covered a little bit better. 

Thanks,

Matti.

import Gaffer

import GafferArnold

import GafferOSL

import GafferScene

import IECore

import imath

Gaffer.Metadata.registerNodeValue( parent, "serialiser:milestoneVersion", 0, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:majorVersion", 51, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:minorVersion", 0, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:patchVersion", 1, persistent=False )

__children = {}

__children["LightFilterDemo"] = Gaffer.Box( "LightFilterDemo" )

parent.addChild( __children["LightFilterDemo"] )

__children["LightFilterDemo"].addChild( GafferScene.Plane( "Plane" ) )

__children["LightFilterDemo"]["Plane"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Group( "Left" ) )

__children["LightFilterDemo"]["Left"]["in"].addChild( GafferScene.ScenePlug( "in1", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Left"]["in"].addChild( GafferScene.ScenePlug( "in2", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Left"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldLight( "spot_light" ) )

__children["LightFilterDemo"]["spot_light"].loadShader( "spot_light" )

__children["LightFilterDemo"]["spot_light"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Group( "Group" ) )

__children["LightFilterDemo"]["Group"]["in"].addChild( GafferScene.ScenePlug( "in1", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Group"]["in"].addChild( GafferScene.ScenePlug( "in2", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Group"]["in"].addChild( GafferScene.ScenePlug( "in3", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Group"]["in"].addChild( GafferScene.ScenePlug( "in4", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Group"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.ScenePlug( "out", direction = Gaffer.Plug.Direction.Out, flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Plane( "Plane1" ) )

__children["LightFilterDemo"]["Plane1"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Group( "Center" ) )

__children["LightFilterDemo"]["Center"]["in"].addChild( GafferScene.ScenePlug( "in1", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Center"]["in"].addChild( GafferScene.ScenePlug( "in2", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Center"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldLight( "spot_light1" ) )

__children["LightFilterDemo"]["spot_light1"].loadShader( "spot_light" )

__children["LightFilterDemo"]["spot_light1"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Camera( "Camera" ) )

__children["LightFilterDemo"]["Camera"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.ShaderAssignment( "ShaderAssignment1" ) )

__children["LightFilterDemo"]["ShaderAssignment1"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.ShaderAssignment( "ShaderAssignment2" ) )

__children["LightFilterDemo"]["ShaderAssignment2"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldShader( "Barndoor" ) )

__children["LightFilterDemo"]["Barndoor"].loadShader( "barndoor" )

__children["LightFilterDemo"]["Barndoor"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldShader( "Gobo" ) )

__children["LightFilterDemo"]["Gobo"].loadShader( "gobo" )

__children["LightFilterDemo"]["Gobo"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferOSL.OSLCode( "OSLCode" ) )

__children["LightFilterDemo"]["OSLCode"]["out"].addChild( Gaffer.Color3fPlug( "outColor", direction = Gaffer.Plug.Direction.Out, defaultValue = imath.Color3f( 0, 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["OSLCode"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( Gaffer.BoxOut( "BoxOut" ) )

__children["LightFilterDemo"]["BoxOut"].addChild( GafferScene.ScenePlug( "in", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["BoxOut"].addChild( GafferScene.ScenePlug( "__out", direction = Gaffer.Plug.Direction.Out, flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["BoxOut"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.ShaderAssignment( "ShaderAssignment" ) )

__children["LightFilterDemo"]["ShaderAssignment"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.PathFilter( "PathFilter" ) )

__children["LightFilterDemo"]["PathFilter"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldShader( "standard_surface" ) )

__children["LightFilterDemo"]["standard_surface"].loadShader( "standard_surface" )

__children["LightFilterDemo"]["standard_surface"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Plane( "Plane2" ) )

__children["LightFilterDemo"]["Plane2"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.Group( "Right" ) )

__children["LightFilterDemo"]["Right"]["in"].addChild( GafferScene.ScenePlug( "in1", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Right"]["in"].addChild( GafferScene.ScenePlug( "in2", flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Right"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldLight( "spot_light2" ) )

__children["LightFilterDemo"]["spot_light2"].loadShader( "spot_light" )

__children["LightFilterDemo"]["spot_light2"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferScene.ShaderAssignment( "ShaderAssignment3" ) )

__children["LightFilterDemo"]["ShaderAssignment3"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"].addChild( GafferArnold.ArnoldShader( "decay" ) )

__children["LightFilterDemo"]["decay"].loadShader( "light_decay" )

__children["LightFilterDemo"]["decay"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["LightFilterDemo"]["Plane"]["__uiPosition"].setValue( imath.V2f( -46.7685165, 5.43458796 ) )

__children["LightFilterDemo"]["Left"]["in"]["in0"].setInput( __children["LightFilterDemo"]["ShaderAssignment2"]["out"] )

__children["LightFilterDemo"]["Left"]["in"]["in1"].setInput( __children["LightFilterDemo"]["Plane"]["out"] )

__children["LightFilterDemo"]["Left"]["transform"]["translate"].setValue( imath.V3f( -1, 0, 0 ) )

__children["LightFilterDemo"]["Left"]["__uiPosition"].setValue( imath.V2f( -46.7685165, -18.4103127 ) )

__children["LightFilterDemo"]["spot_light"]["transform"]["translate"].setValue( imath.V3f( 0, 0, 0.75 ) )

__children["LightFilterDemo"]["spot_light"]["__uiPosition"].setValue( imath.V2f( -49.7685165, -2.08218813 ) )

__children["LightFilterDemo"]["Group"]["in"]["in0"].setInput( __children["LightFilterDemo"]["Left"]["out"] )

__children["LightFilterDemo"]["Group"]["in"]["in1"].setInput( __children["LightFilterDemo"]["Center"]["out"] )

__children["LightFilterDemo"]["Group"]["in"]["in2"].setInput( __children["LightFilterDemo"]["Right"]["out"] )

__children["LightFilterDemo"]["Group"]["in"]["in3"].setInput( __children["LightFilterDemo"]["Camera"]["out"] )

__children["LightFilterDemo"]["Group"]["__uiPosition"].setValue( imath.V2f( -5.88885498, -26.5743752 ) )

__children["LightFilterDemo"]["out"].setInput( __children["LightFilterDemo"]["BoxOut"]["__out"] )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["out"], 'nodule:color', imath.Color3f( 0.240099996, 0.339399993, 0.485000014 ) )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["out"], 'connectionGadget:color', imath.Color3f( 0.119999997, 0.150000006, 0.349999994 ) )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["out"], 'nodule:type', 'GafferUI::StandardNodule' )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["out"], 'description', 'The processed output scene.' )

__children["LightFilterDemo"]["Plane1"]["__uiPosition"].setValue( imath.V2f( -8.88885498, 7.78299522 ) )

__children["LightFilterDemo"]["Center"]["in"]["in0"].setInput( __children["LightFilterDemo"]["ShaderAssignment1"]["out"] )

__children["LightFilterDemo"]["Center"]["in"]["in1"].setInput( __children["LightFilterDemo"]["Plane1"]["out"] )

__children["LightFilterDemo"]["Center"]["__uiPosition"].setValue( imath.V2f( -8.88885498, -4.88537025 ) )

__children["LightFilterDemo"]["spot_light1"]["transform"]["translate"].setValue( imath.V3f( 0, 0, 0.75 ) )

__children["LightFilterDemo"]["spot_light1"]["__uiPosition"].setValue( imath.V2f( -11.888855, 22.4847565 ) )

__children["LightFilterDemo"]["Camera"]["transform"]["translate"].setValue( imath.V3f( 0, 0, 2 ) )

__children["LightFilterDemo"]["Camera"]["__uiPosition"].setValue( imath.V2f( 15.3607731, -18.4103127 ) )

__children["LightFilterDemo"]["ShaderAssignment1"]["in"].setInput( __children["LightFilterDemo"]["spot_light1"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment1"]["shader"].setInput( __children["LightFilterDemo"]["Gobo"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment1"]["__uiPosition"].setValue( imath.V2f( -11.888855, 14.320693 ) )

__children["LightFilterDemo"]["ShaderAssignment2"]["in"].setInput( __children["LightFilterDemo"]["spot_light"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment2"]["shader"].setInput( __children["LightFilterDemo"]["Barndoor"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment2"]["__uiPosition"].setValue( imath.V2f( -49.7685165, -10.2462502 ) )

__children["LightFilterDemo"]["Barndoor"]["attributeSuffix"].setValue( 'barndoor' )

__children["LightFilterDemo"]["Barndoor"]["parameters"]["barndoor_top_left"].setValue( 0.20000000298023224 )

__children["LightFilterDemo"]["Barndoor"]["parameters"]["barndoor_top_right"].setValue( 0.5 )

__children["LightFilterDemo"]["Barndoor"]["parameters"]["barndoor_top_edge"].setValue( 0.10000000149011612 )

__children["LightFilterDemo"]["Barndoor"]["__uiPosition"].setValue( imath.V2f( -67.5196838, -10.2462502 ) )

__children["LightFilterDemo"]["Gobo"]["attributeSuffix"].setValue( 'gobo' )

__children["LightFilterDemo"]["Gobo"]["parameters"]["slidemap"].setInput( __children["LightFilterDemo"]["OSLCode"]["out"]["outColor"] )

__children["LightFilterDemo"]["Gobo"]["parameters"]["slidemap"]["r"].setInput( __children["LightFilterDemo"]["OSLCode"]["out"]["outColor"]["r"] )

__children["LightFilterDemo"]["Gobo"]["parameters"]["slidemap"]["g"].setInput( __children["LightFilterDemo"]["OSLCode"]["out"]["outColor"]["g"] )

__children["LightFilterDemo"]["Gobo"]["parameters"]["slidemap"]["b"].setInput( __children["LightFilterDemo"]["OSLCode"]["out"]["outColor"]["b"] )

__children["LightFilterDemo"]["Gobo"]["__uiPosition"].setValue( imath.V2f( -24.3949585, 14.320693 ) )

__children["LightFilterDemo"]["OSLCode"]["code"].setValue( 'outColor = noise( P * 25 );' )

__children["LightFilterDemo"]["OSLCode"]["__uiPosition"].setValue( imath.V2f( -35.2660522, 14.320693 ) )

__children["LightFilterDemo"]["BoxOut"]["in"].setInput( __children["LightFilterDemo"]["ShaderAssignment"]["out"] )

__children["LightFilterDemo"]["BoxOut"]["__out"].setInput( __children["LightFilterDemo"]["BoxOut"]["in"] )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["BoxOut"]["__out"], 'nodule:color', imath.Color3f( 0.240099996, 0.339399993, 0.485000014 ) )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["BoxOut"]["__out"], 'connectionGadget:color', imath.Color3f( 0.119999997, 0.150000006, 0.349999994 ) )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["BoxOut"]["__out"], 'labelPlugValueWidget:renameable', True )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["BoxOut"]["__out"], 'nodule:type', 'GafferUI::StandardNodule' )

Gaffer.Metadata.registerValue( __children["LightFilterDemo"]["BoxOut"]["__out"], 'description', 'The processed output scene.' )

__children["LightFilterDemo"]["BoxOut"]["__uiPosition"].setValue( imath.V2f( -5.88885498, -53.1073761 ) )

__children["LightFilterDemo"]["__uiPosition"].setValue( imath.V2f( -1.95168495, -44.1797791 ) )

__children["LightFilterDemo"]["ShaderAssignment"]["in"].setInput( __children["LightFilterDemo"]["Group"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment"]["filter"].setInput( __children["LightFilterDemo"]["PathFilter"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment"]["shader"].setInput( __children["LightFilterDemo"]["standard_surface"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment"]["__uiPosition"].setValue( imath.V2f( -5.88885498, -44.7753448 ) )

__children["LightFilterDemo"]["PathFilter"]["paths"].setValue( IECore.StringVectorData( [ '/group/group/plane', '/group/group1/plane', '/group/group2/plane' ] ) )

__children["LightFilterDemo"]["PathFilter"]["__uiPosition"].setValue( imath.V2f( 9.24274445, -36.5660133 ) )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id1"].setValue( 'id_1' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id2"].setValue( 'id_2' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id3"].setValue( 'id_3' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id4"].setValue( 'id_4' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id5"].setValue( 'id_5' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id6"].setValue( 'id_6' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id7"].setValue( 'id_7' )

__children["LightFilterDemo"]["standard_surface"]["parameters"]["aov_id8"].setValue( 'id_8' )

__children["LightFilterDemo"]["standard_surface"]["__uiPosition"].setValue( imath.V2f( -40.9373512, -44.7753448 ) )

__children["LightFilterDemo"]["Plane2"]["__uiPosition"].setValue( imath.V2f( 27.9168015, 16.454546 ) )

__children["LightFilterDemo"]["Right"]["in"]["in0"].setInput( __children["LightFilterDemo"]["ShaderAssignment3"]["out"] )

__children["LightFilterDemo"]["Right"]["in"]["in1"].setInput( __children["LightFilterDemo"]["Plane2"]["out"] )

__children["LightFilterDemo"]["Right"]["transform"]["translate"].setValue( imath.V3f( 1, 0, 0 ) )

__children["LightFilterDemo"]["Right"]["__uiPosition"].setValue( imath.V2f( 27.9168015, 3.43969536 ) )

__children["LightFilterDemo"]["spot_light2"]["transform"]["translate"].setValue( imath.V3f( 0, 0, 0.75 ) )

__children["LightFilterDemo"]["spot_light2"]["__uiPosition"].setValue( imath.V2f( 24.9168015, 30.4633389 ) )

__children["LightFilterDemo"]["ShaderAssignment3"]["in"].setInput( __children["LightFilterDemo"]["spot_light2"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment3"]["shader"].setInput( __children["LightFilterDemo"]["decay"]["out"] )

__children["LightFilterDemo"]["ShaderAssignment3"]["__uiPosition"].setValue( imath.V2f( 24.9168015, 22.2992744 ) )

__children["LightFilterDemo"]["decay"]["attributeSuffix"].setValue( 'light_decay' )

__children["LightFilterDemo"]["decay"]["parameters"]["use_near_atten"].setValue( True )

__children["LightFilterDemo"]["decay"]["parameters"]["near_end"].setValue( 3.0 )

__children["LightFilterDemo"]["decay"]["__uiPosition"].setValue( imath.V2f( 10.7151413, 22.2992744 ) )

del __children

Matti Gruner - R&D Software Developer

Image Engine

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[dan...@image-engine.com]

As for your other question about skydome lights, all that should be necessary to get a latlong image hooked up is:

* create a skydome_light

* create an Arnold "image" shader, and connect it to "color" on the light

* set "Format" on the skydome_light to "latlong"

Here's a quick test I did, which seems to work ( as a copy-and-pastable network ):

import Gaffer

import GafferArnold

import GafferOSL

import GafferScene

import IECore

import imath

Gaffer.Metadata.registerNodeValue( parent, "serialiser:milestoneVersion", 0, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:majorVersion", 52, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:minorVersion", 0, persistent=False )

Gaffer.Metadata.registerNodeValue( parent, "serialiser:patchVersion", 0, persistent=False )

__children = {}

__children["skydome_light"] = GafferArnold.ArnoldLight( "skydome_light" )

parent.addChild( __children["skydome_light"] )

__children["skydome_light"].loadShader( "skydome_light" )

__children["skydome_light"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["image"] = GafferArnold.ArnoldShader( "image" )

parent.addChild( __children["image"] )

__children["image"].loadShader( "image" )

__children["image"].addChild( Gaffer.V2fPlug( "__uiPosition", defaultValue = imath.V2f( 0, 0 ), flags = Gaffer.Plug.Flags.Default | Gaffer.Plug.Flags.Dynamic, ) )

__children["skydome_light"]["parameters"]["color"].setInput( __children["image"]["out"] )

__children["skydome_light"]["parameters"]["color"]["r"].setInput( __children["image"]["out"]["r"] )

__children["skydome_light"]["parameters"]["color"]["g"].setInput( __children["image"]["out"]["g"] )

__children["skydome_light"]["parameters"]["color"]["b"].setInput( __children["image"]["out"]["b"] )

__children["skydome_light"]["parameters"]["format"].setValue( 'latlong' )

__children["skydome_light"]["__uiPosition"].setValue( imath.V2f( 84.9489822, 16.6277504 ) )

__children["image"]["parameters"]["filename"].setValue( '/home/danield/test_crud/mandrill.tx' )

__children["image"]["__uiPosition"].setValue( imath.V2f( 72.2624588, 17.2277508 ) )

del __children

[Sumit Suri]

Hi Guys,

thanks guys very helpful.

Latlong on skydome works fine.

Arnold Filters -

1. Gobos, barndoors work well with Spot Light but I not with quad lights. I am not sure if thats how arnold quad lights work or its a limitation with the current version.

I am still having issues getting blockers to work, would be great if I can get an example of that aswell.

thanks once again

Sumit

[Matti Grüner]

Hey Sumit,

I'm glad we could help.

In regards of your remaining questions:

• Light Filters and Light Types

I am quoting from the Arnold docs in the following.

Light Decay

This filter can be added to all Arnold Lights. This is where you will specify the attenuation ranges. All lights in Arnold use a physically-based falloff by default, but the light_decay filter can be used to adjust the falloff for artistic purposes.   

Barndoor

This light filter can only be used with spot lights.

  

Gobo

The gobo filter can only be used with spot lights.

• Blocker

Like I said in a previous email, currently there is no support for blockers, but they are slowly bubbling up to the top of my list of things to look into. They are a little bit different than the rest of the filters in that they are not attached to a single light and can be transformed independently. Some extra development will be needed because of that.

Matti.

--

[Sumit Suri]

sounds great

cheers

Sumit