Prepass/Animation with particle instances

[pechart]

Hi!

I've got a problem that I've already reported to the support, but maybe someone here knows a solution.

I have a scene with particles and instances connected to the particles with the instancer, nothing fancy. I'm using IRMap and Lightcache. When I render a single frame wit GI everything looks like it should. When I switch to the prepass mode the IRmap gets screwed up. It looks a little bit, like the IRMap doesn't recognize the instances at all. You can see the differences, if you enable 'don't render final image' in single frame mode.

I've attached a simple scene where you can check the problem.

A solution that came to our mind is, that we just render in single frame mode and use the IRMap files generated in the animation mode afterwards. But for some reason this isn't possible and we get an error saying, that the IRMap is not usable for this mode.

Any ideas? Thanks!

Expected final rendering:



IRMap in prepass mode:



IRMap in single frame mode:


Sample Scene file:
instancer_irmap_tests_v01.zip


EDIT: The Devs have logged this as a bug and are working on it.

[Morbid Angel]

I dont recall now the exact name but there is a script out there to bake instancer into geometry or instances, you could use that one for now, if your scene is not too complicated.

[pechart]

Yes, there are several tools for that. The tkParticleUninstancer script, the nimble tools plugin and also some custom scripts. Right now I'm using the nimble plugin, which is much faster than the script. But for this to work I have to export/import the whole setup every time. For a workaround this is okay, but of course it would be much nicer, if I could render directly. Anyway, thanks for you reply!