Vray nightly caustics issue and quality

[Dariusz Makowski (Dadal)]

Heya

I've been doing some test lately with caustics to freshen up my skill with them and I run in to some interesting issues..

Using nightly 20130318

I get some sort of caustic cut off/bugs happening. From images you can see render times and caustic subdivision per light. As I go higher I get longer render results and some issues with caustics start popping up. Only way to fix it was to use max density - is that the proper approach ?

CausticBug_01.mb.zip

Regarding caustic itself I want to keep them quite sharp but so far the render times get very long and quality is still quite far away from where I'd like to see it...

Any suggestions how to get them where I want ? Or is it normal...

[vlado]

The cutoff thing looks like a bug but I will need to play with the scene to be sure.

Best regards,
Vlado

[yolov]

Hi DADAL,

We've been playing around with the settings in that scene. We're not sure if there's a bug with that cut-off effect, but we'll look into that. In the meantime, with the current settings, when setting the max density to 0, it seems that max photons 20 is just too little and besides increasing the density to 0.001, you can leave it to zero and up the max photons to avoid that issue. Let me know if there's something else regarding the caustic map.