Vray Frame Buffer Histogram

[Richard Devonshire]

I'm currently rendering out some tests. I'm using 3ds max / vray 2. The scene is set up with a dome light + hdr and a vray physical camera. I'm rendering using universal settings. I'm working in LWF.

 

I'm getting a well exposed and well balanced image but the histogram in the vray frame shows the histogram squished to the left hand side (underexposed) If I tick the clamp output in colour mapping rollout the histogram appears balanced.

 

How can I control this to get consistent results to the histogram without having to clamp the output. Thanks

[Francisco Penaloza]

Depending what you setup in your color mapping mode, Color mapping only, color mapping and gamma or nothing. The histogram will show you the lighting values in a float scale, if you click clamp you will set a ceiling or clamp the amount of lighting info to what you select in the clamp level.

 

If you want to control within V RAy the brightness of your image, you may need to use Color mapping only, or even color mapping and gamma mode and then using Reinhard or exponencial to control how bright or burn the whites get.