How do you avoid aliasing on high contrast areas?

[joey145]

Antialiasing Filter is ON (2, Lanczos)

I usually get very noticable aliasing on high-contrast areas with diagonal lines, e.g. windows, lights, etc.

I can sometimes "hide" these by adding large amount of Glow/Bloom, but I don't want that all the time.

What would be a good "real" solution for this?

[Bruce Hart]

Hey Joey
This can be an issue using self illuminated materials or visible light planes that have colour/multiplier values that are too high. If these values are extreme the AA image sampler won't be able to cope with the contrast. Try lowering the intensity of the lights and increasing your camera exposure to suit. In a scene like that your camera exposure might be say F-Stop 6, Shutter 100, ISO 100. If you try that exposure for example and your scene is way too bright, it could mean you are not in the ball-park as far as the light values are concerned. Additionally, Right-click on the bright areas in the Vray Frame-buffer after you render. You should see some Color (Float) information. If these values are way above 1.0, then this can be an indicator that your values are too high and Vray is doing its best to clamp them down.