I have a pane of glass with an ‘etched’ circle in it (using a boolean difference operation with a tube). As a static picture it looks OK but as soon as you render a movie with the camera moving the etched area shimmers … like crazy - it’s like the refraction and/or reflection and/or ray tracing calculations for the etched faces keep flip-flopping frame-by frame as to what should be shown … reflect light, don’t reflect, refract in this way, or that etc. Playing around though with the various settings makes me think it’s a reflection problem. I would understand it if the shimmering was predictable and slow with slow camera movement but it isn’t. I’m at a bit of a loss really.
This is the second time I’ve had this shimmering problem. The other time it was just on a flat surface.
I’m tried to use a UV map to fog/smoke the etched area (like it would probably look in real life) to mask it but it’s still not enough to hide the shimmering. Any thoughts anyone.
P.S. I’m relatively new to Blender so I hope this all makes sense. Hopefully a Noob question!
Image of offending object attached.