Rendering a stack of transparent Objects

[o-v]

Hello there

I would appreciate a hint about how to render a stack of 24 glas plates with a decent speed. It takes ages at the moment. I mean once the bucket hits the stack (the rays have to pass all objects) - rendering stalls. I hadn't manage to get a bucket done on the stack yet.

the scene is lit by one dome light with a hdri map.

max 2016/vray 3.40.01

I turned the refl. and refraction glossyness to 1 yet. so not realistic anymore.

The max trace depth of the material is set to 50 and the max transp. levels in the rendersetup are set to 60.

The GI method is LC/BF

image sampler is set to bucket/min. shading rate 6

bucket image sampler: min subdivs. 1, max subdivs 24, noise threshold 0,01

everything else is pretty much at default.

is there a thing I forgot to set?

Thank you very much for any info.

[Morbid Angel]

yeah tracing that many refractive panes will be a problem did you check - affect shadow in refraction?

You might have luck with having low reflection trace and high refraction trace though give that a try too.

[7enith]

I have a similar problem with a glass product which has a lot of rough refractions and sss in it. Usually I use Maxwell for this kind of stuff and it excels with glass, but it doesnt provide you with alphas behind glass.

[Morbid Angel]

Glossy materials with sss and refraction will be slow, can you show me what kind of issue you have? or post a part of the scene?