Fireflies on rounded corners (Tessellated mesh and up'd corner samples to 25)

[3dwannab]

See image of asset I'm working on. I can't see anyone else reporting this issue. I did see one thread but it's marked as inactive. Found: https://forum.corona-renderer.com/index.php/topic,2619.msg19883.html#msg19883

This issue becomes more troublesome the closer you get to the objects corners. I can send a max file to https://corona-renderer.com/upload/ for a test scene. The reflection pass is where the trouble lies.

BTW What is the preferred maximum for the samples for round corners?

[romullus]

I'm avoiding to use rounded corner feature on materials with high specularity, because it's really hard to get rid of fireflies otherwise.

[3dwannab]

Albedo is at 186RGB at those corners. Kinda strange this is happening.

I'll go with your method. Thanks.

[Ondra]

Do you still think there is a bug? Rounded corners will be probably always very noisy for highly specular materials, because of the way they are computed.

[3dwannab]

No, just a bug with the rounded corners on highly specular mats regardless of the amount of samples used. I have tried 99 in my testing with tessilated mesh and still got issues. Do you want this scene to test with?

[Ondra]

no... this is just limitation of the rounded corners method used - it produces noisy normals, that will cause problems with mirror materials.

[Ondra]

I added it here: https://corona-renderer.com/wiki/troubleshooting

[3dwannab]

Thanks for clarifying this. Thank goodness for the chamfer modifier :]