Anti-aliasing ?

[bernhard]

Hello Hello,

when using self-illumination materials or lights with very high intensity settings, I run (like everyone else does I guess) into Anti-aliasing issues.
I usually do not clamp the output.

- How do you usually treat this issue ?
- What is your workaround to avoid that problem ?

A very common thing are lights.. lights with light-fixtures, lamps, or what ever.
Please see below quick test showing the Anti-aliasing problem.

[Neilg]

Either - Vray override material - different intensities for the visible material and the gi (and reflection/refraction)
Or - Clamp exp to 5 or something.

[Morbid Angel]

Im afraid that you going to have to clamp it at 1, 5 is still high to process. Generally the logic is that there would be glow in the lens at the point of such brightness if you were to point your camera at the real lamp. So you can bring down the clamping if you don't care about float values, or apply glow to the white areas in post.

[grantwarwick]

The physical approach is to use vary bloom and glare!
In real life hot areas like this will always produce the effect even if its subtle.

[bernhard]

yeah, makes all sense. but to be more specific... I use inside the lamp a vray spherical light - so I can make sure that the light spreads from the inside the lamp to the outside.. like in real life.... I do not use a self illumination shader for the inner shell of the lamp....
The oevveride mat also doesn't work, because the sphere light has to have very bright... I fear clamping seems to be the only way to do it... but was jut curios if there would be any other option, any other idea dealing with that issue..... thank you !

[Neilg]

Put a very dark / half refractive glass over it which doesn't contribute to reflection/refraction, GI or cast shadows.