Missing refraction distortion - BUG?

[davetwo]

Hi - I have a fairly niche setup, where I'm placing a piece of distorted glass in front of the camera to deliberately cause ripples and distortions in the scene.

This was working fine, and is still working in the interactive viewport, but when I come to render properly the effect disappears.

Any ideas?? What is going on or if it's a bug?

(The glass panel is a legacy material, no reflection, distortion contolled by noise).

Win11 C4d 25 1.2 corona 12.1.1

[davetwo]

PS. I remade the glass panel in physical material - same problem. Effect is also correct in IRR. Just disappears in final render.

[davetwo]

Ah nevermind - fixed it.
for reference the problem seemes to be that the glass panel was made from a plane inside C4Ds 'Thicken' object.
Once I make it from standard geommetry it works fine.

[maru]

Which version of Corona and C4D is this?
It's still weird that you are getting different results in the PV and IR. Could you share the scene?

[John_Do]

Probably the bump channel issue that is around since forever ?

[davetwo]

Which version of Corona and C4D is this?
It's still weird that you are getting different results in the PV and IR. Could you share the scene?

Win11 C4d 25.1.2 - Corona 12.1.1

[davetwo]

Probably the bump channel issue that is around since forever ?

No bumo - only displacement. BUT it is a layered noise which was part of the bump issue if I remember correctly?

[maru]

I couldn't reproduce it. Corona 12 Update 1 Hotfix 1, C4D 2025.1.2. A material with noise used as displacement renders fine in interactive viewport, Corona's IR, and PV. Could you share this scene with us, or any scene where this can be reproduced?

[davetwo]

Dont worry - something wierd with the file I think. Seems OK on a clean version