Hello,
If I use a bump map that is not black and white, will it be read as black and white in V-Ray for SketchUp? and if it does it automatically does this transfer option influence it ?
Hello @p_p1 ,
The correct workflow would be to use a black and white image for the Bump map mode. If you have an appropriate colorful image, you can make it black and white and adjust the contrast in an image editing software. In general, V-Ray will convert the RGB values into grayscale intensity, but the contrast of the grayscale values might not be high enough to achieve a good Bump effect.
You can also use the Chaos Cosmos AI Material Generator to create a material from an image. It will generate the Normal and Roughness maps and will make the maps tileable.
The Transfer Function specifies the color data (gamma curve) of an incoming image file, so that they will be translated into linear color space, where V-Ray performs the rendering calculations. For example, .png and .jpg images are saved in sRGB color space, which applies a non-linear curve (about 2.2 gamma correction). V-Ray auto-determines and sets the correct Transfer function upon loading the first Bitmap file.
Note that for Bump and Normal maps Transfer Function needs to be set to None and RGB Primaries need to be set to Raw.
Please let us know if you have any further questions.
Kind regards,
Iva