3ds max diffuse texture bake for roughness map for Unreal.

snake85027

I like to use a multisub material in max and have the first mat black and second is white and use the texture baking on diffuse to create the roughness map as a tga file. When I try and use it in UE4 it doesnt work the way I expect, it actually feels like it just ignores it. I created a constant vector 3 node in UE4 and set it to white and connected it to the roughness and the roughness worked like it should. Is there something I need to do with the texture from 3ds max in maybe photoshop or within UE4 to get it to not ignore the pixels? I read that with Roughness maps from substance painter you have to uncheck the sRGB and set the node Sampler type to Linear color to get the roughness to act right but it didnt help me. Any Suggestions would be awesome thanks.

poopipe

Roughness is a single float, you don't need a vector3

If you baked it as a diffuse you should probably leave the sRGB ticked as that's how it'll have been stored from the bake. 

We can't diagnose the problem without a picture. 

snake85027

Im using a image because I have different values. Parts of the model I dont want to be reflective.

snake85027

Its for work. I cant post it.

Eric Chadwick

Disable gamma in Max to bake in linear. At least, that's true here in Max 2018 with either V-Ray or Scanline. 

snake85027

I guess I'm a fool. In unreal, I switched the view mode to reflections. I thought this was representing the roughness map. I didn't realize that the view mode is there to show you the reflection quality of your reflection spheres. In the Roughness view mode it looks correct. So disregard this thread I guess.