automated render region vray

[Hannes Reindl]

Hi

I stuck a little in a problem.
We wrote a script that get us the bounding box for an object, but now i
can't figure out wich attributes i need to set so vray only render that
region when i send it into the farm.
if anyone could help me with that, this would be great.

thx
Hannes

[Ævar Guðmundsson]

Hi Hannes

  It's pretty simple, use the -reg flags on the command line and render away.  Just feed it the numbers you have already gathered and run your render command in multiples.

Let us know if you need any more information, hope it goes well!

[Hannes Reindl]

Thanks, but this works only in command line i guess. I'm searching for a way to set the attributes inside maya so i have feedback when i test render in render view and i would start the script as a startup script in pre frame mel.

We already did this once with arnold, the thing is arnold has a user option variable which overrides the batch command so i was able to do this very easy.

[Ævar Guðmundsson]

Same applies really, been years since I personally clicked "render" without it being a redirected shell command doing the actual render...

Hope that makes sense, as in even if you are rendering just 1 frame full bounding box etc etc etc Id have thought you'd still be running a single command line render to get that frame

The two methods don't compare, one is clicking things and then running into scenarios as you describe :) the other is scalable for things like this, by performing your renders always command line no matter how small you get them any modification is a small addition to your pipe rather than a new concept is what I'm trying to get at I guess.

There is a way to do this in the UI of course, would throw you the example but am travelling up near the arctic circle and don't Maya with me.

anyone else feel like writing either a snippet which either replaces the default render button with a default render shell command picking up from the render globals so the -reg flag is passable to it? ( isn't the option already there in the render globals? , called region of interest it something like that )
Or go the complex way about it and build a container, split it into cubes and control your segments in 3D space, you get some insanely fast simulations and exponential renders when they start affecting each other but I'm not really sure you want to go down that route.

If all you are after is just a "click and show me this part" , rather than splitnStich a few terabytes of data into a complete image the answer is within the render globals, the same as where you found the Arnold ones.