Animating light trough a prisma

Support Modeling
1

For my next project i need to animate light trough a prisma.
I’m aware of the trick to add 3 glass shaders (a red, green and blue one), and offset each ior value.
I used it in some test but somehow the recent builds dont render the faked prisma as well.

I also tried luxcore, which jus simply crashed, so cannt use that.
And I tried old 2.7x experimental metropolis build, (worked but was way to noisy).

Maybe someone one knows of any other idea to fake a sharp bright spectral prisma ?
a camera will turn around the prisma, (cannt use a 2D image or photo of a real one either).

I’ll use cycles preferably but a faked eevee result if looking great might be possible as well.

some thoughts i had to improve faking it, is perhaps use 3 lamps (r+g+b) but that didnt work well either.

2

Have you tried the latest daily build of luxcore from here?

It’s easily the easiest way to achieve what your looking for, attached is a 1m30s (denoised) render of a laser light, prism and mirror in a volume:

Prism
Prism1280×720 197 KB

3

I tried their latest build and blender latest build. What builds have you been using?

4

I mate tuto about caustic in BlendLuxCore, there is also a word about dispersion. Maybe you will find this introduction usefull

2.82 and 2.3 works perfectly fine for me

5

I would try it with Blender 2.83, and the latest daily build should work, what error does it give in the Blender console?

6

Well Blender imidiatly crashed when rendering in 2.9,
I switched over to 2.8, and eventually it worked, though I’m not so impressed, its vagualy visible after long render time.

I’m now thinking of faking it with volume shaders, its how people like to see it (the whole light path) then i can make it more clear as well (i hope).