Strange Caustics artifact???

[TravisM]

I am working with MR caustics and am getting a strange effect on refracted caustics. The object is a simple editable poly with subdivision smoothing set at level 2. The refracted caustics are showing a wireframe effect from the object. This looks very strange.

Unless I am misunderstanding something, it shouldnt look like this (see attached image)

Can anyone shed some light on this?

Attached are a sample render and a screenshot of the caustic settings

thanks

Travis

[Dodgeas3d]

Could you add model wire frame ? i think you should increase model smooth interations, couse coustics settings are precise and you get geometry look of it.....

[TravisM]

I've attached the wireframe used for the render in the initial post (wireframe.gif)

Ive also attached a render and wireframe with a much denser subdivision setting. The banding artifact is still present.

It seems strange that you would have to make such a dense mesh in order to avoid this sort of artifact. If i were to make a scene using multiple objects, the polygon count would get ridiculously high.

[Dodgeas3d]

This happens becouse your coustic photons are denser then mesh, I mean they cast thru poly by small radius and big amount generating exact geometry coustic. I think you should blur it out more like increasing photons per sample and increasing sampling radius till you get rid of this geometric looking-coustics.

[TravisM]

I think I understand what you are getting at. I'll try changing the settings. I'll follow up with my results.

Thank you for taking the time to reply

travis