Re: Light And Shadow.
Eufrasia Radich
Besides, there seems to be something wrong with the normal data of your geometries. When I set the intensity of the ambient light to zero so only the directional light illuminates the scene, it looks like so:
I figured that out before, so that line is now gone. I also added my mesh as light.target which made the mesh look better. But is seems like the light is coming from another direction than the frustum. Do you have any idea where to start debugging this? I thought the frustum represented the bouding box for the light?
Hello,
I am looking for suggestions for a light source for a devised piece we are doing. We are exploring some of the images in our piece with shadow play behind the cyc. So far, the clearest and sharpest images are made with our phone light. Does anyone have any experience with this? We are looking to create shadow images with our bodies mostly.
Many Thanks!
This is really dependent on multiple factors, the throw distance and amount of coverage required, if you are using the back of your CYC is it 3' off the rear wall of the stage? Or a greater distance, do you want a soft or sharp image, I would recommend playing with some of your theatrical fixtures to see what works the best for you.
We worked on a shadow puppet piece with small LED high-lumen flashlights. They aren't expensive, and the type we have can zoom in and out for narrower or wider beam. The key is not looking right at them, of course!
You can really use any light source for this project-- from and elipsodial to a flashlight. I think it would be cool to let your students decide what works best for their group, perhaps have various options available to them and see what they select. That would be a cool process for them.
I have done this several times. The best solution is a single light source. If you can use some frost to disperse the light it might help. A single small table lamp with or without a shade seems to work best.
Basically in the scene I have:
-Dyrectional Light set to movable
-Sky Light set to movable
-Force No Precomputed Lighting = true
Basically, in the scene, every light is dynamic. I have no lightmaps and no static light.
I tried to create a new project, with an empty map, but it seems that the lights have to be rebuilt to be able to cast the shadows.
Without lightmap, in versions 4.26 and 4.27 nothing seems to work.
i really love your lighting here, not just the projective idea from the initial artist but also your recreation. and in specific the seeming simplicity and subtleness of the shadow and the light fall off. did you use a rhino spotlight for this? can you briefly explain your overall light? i tried to rebuild a simple scene using a spotlight which does not allow me to create a soft edge, using a point light with a physical parabel gives me softer edges but i can not recreate the soft fall of where the light emits out.
I used Spotlight and play with settings.
The key to get soft shadow is to decrease Shadow intensity depend on the scale of the objects and distance , you need to play with it until you get the wanted shadow then play with other settings: intensity, hardness, falloff to increase or decrease the light intensity.
with this knowledge i tried now rectangular light and got again confused does the same apply there? lowering the intensity there rather looks like it does the opposite meaning that the light source gets smaller and the shadow gets blown out additionally.
I think some users here including me are capable of produce rapid prototypes and models. Maybe there is a way to try a small collaboration in this.
I am able to print things 3d and I am able to cut with a 50w Co2 Laser max. 600x375
Be aware that shadow maps are scale dependent. I'm working on a scene where the unit distance represents one metre, and my objects are around 0.4 metres large. This is quite small by Three.js standards. If you have this situation too, then you can take a few important steps:
Yes, you most definitely can use directional lights to cast shadows. You need to make sure you are not using MeshBasicMaterial as they don't support shadows. Use MeshLambertMaterial or MeshPhongMaterial instead.
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