i have question about Roughness and metalic Texture

[3dpotsm]

hi guys
I think the photo scan as a possibility of the future.
Nevertheless, I am studying for fun.
i dont know about make roughness and metalic texture.
How do you guys make this?

[3create]

Hi,

Metashape "only" extracts the diffuse texture (and optionally normal and occlusion map), so deriving specular and glossiness maps is manual "guess work" (i.e. not physically correct).
There are 3rd party tools for extracting gloss and specular based on the diffuse map, however, the resulting textures are not accurate.

I therefore take a predefined material in the target 3d application which kind of matches the desired characteristics of my photoscanned object as reference for the other maps.
Then it's tedious Photoshopping/masking using the diffuse texture as a basis.

Yes, getting the physically correct specular/gloss (or metal/roughness) maps from photoscanned projects would be awsome!
However, this would require a complex setup with varying illumination angles, colors etc. per shot (search for scanned materials, light field).

If anyone knows of a more efficient approach, I'd also be extremely grateful