Hey Guys,
For what seems to be an eternity, I’ve always had trouble with VLM and AA. For example, I currently have a scene that has a fluorescent tube light and I’m using VLM for the tube. The jaggies are really noticable on this, is there any way to fix it?
I’m using 3.30.03 Progressive, with a noise threshold of 0.0 and a time of 0.0. Unfortunately I can’t post the scene as it’s under NDA.
Thanks!
Excellent post! I’m having the same issue myself when rendering an animation. The LightMtl will look jagged and flickers frame to frame 
I’m using LC & IRR. Adaptive AA
Interested to hear any suggestions
High max aa, glows in post to soften, possibly use a softer aa filter.
If you don’t need to use the high range values and you’re not going to be doing much post processing on it after, you can also use clamp in the image sampler and use a value around 1.5 - 2 - that’ll make the render less physically accurate but it’ll make the image samplers job easier too.
I just changed the Clamp output from 1.0 to 2.0 and the LightMtl is much cleaner - thanks for the tip
To get compeltely rid of it you can clamp at 1 and use sub-pixel-mapping. Then some softening filter (if required at all) like quadratic or cubic and you’re set.