Why does the acrylic sheet render incorrectly in the simulation?
When simulating a transparent acrylic sheet, we see unexpected artifacts and incorrect light refraction, especially at edges.
Steps to reproduce:
Load the test scene with an acrylic sheet.
Apply default acrylic material.
Run the simulation.
Expected: Correct refraction and no visible artifacts. Actual: Edge flickering and unnatural light bending.
This only happens at certain angles; other transparent materials work fine. Configuration files can be shared if needed.