Generate a mask for Map from the color range

[flat]

Does anyone know how to create a mask map (grescale) from a specific RGB range in 3ds Max shader tree? (The source is a baked ID map.)

It's like Photoshop's Select Color Range.


From the Bitmap Output rollout it is hard to find the RGB region I want to output.

Only 3 channels of R, G and B can be output by RGB decomposition and The RGB Tint map.

[hermit.crab]

I guess it can be done with multiple Color Key OSL maps, however, I am not certain the results would be satisfactory. Seems easier to do it in PS and bring the masks in.

[flat]

Thank you for your comment.

I'm doing research, but it seems that the material definition in ID Mask is not used much in the visualization industry. (Mostly workflows that create materials for each object)

If this is possible with V-Ray, it is very convenient because one VRayMtl can define the material of multiple objects and it can be tuned on 3ds Max, but I will give up if no one else agrees.