Seeing a lot of noise and aliasing in a short turntable animation with a pure white background. Noise limit is 1.5% with .65 noise denoising (Intel CPU AI). File is saved into .avi format (link); download file and view with VLC.
Not sure how to reduce the noise further or why the aliasing is appearing at all(?)
Hi Cjwidd,
What’s the current output resolution?
Also what’s your current image filter, have you tried with different ones?
I’ve tried 1000 x 1000 up to 2000 x 2000, similar results.
I think I tried tent (2.0) and High Quality.
The white background comes from a direct visibility override. I was wondering if maybe there is some alpha cut-out issue happening that is causing the aliasing. Maybe too much sharpening in the VFB?
I can share the scene to the uploader if that would help.
Please do so, it will be easier to investigate than try and recreate it. Thanks!
@GeorgeK, finally uploaded that scene - sorry for the delay 
Thanks for the scene, so basically this is how the image filter/antialiasing currently works. If you are rendering a dark edge against a gray background the anti-aliasing will be smoother than against a bright override. (related: https://forum.corona-renderer.com/ Black and White Masking Issue - Stroked/Halo Edges #msg144961)
My suggestion would be to save your sequence with alpha channel and no background overrides (png or tiff etc.) and apply a white background in post-process, or you can also take a look at the following: https://coronarenderer.freshdesk.com/support/solutions/articles/5000515615
I was afraid you were going to say that. So the aliasing is related to how the image is being cutout (alpha) when rendering with a pure [0, 0, 0] or [255, 255, 255] direct visibility override(?)
Is there a way to (sort of) fake this by using a CoronaRaySwitch on a background plane or something?