Curvature map issue

CrazyBuch

Hi, all!
Please help me to understand why I can't bake correct curvature map for my mesh.
So I have:
1. Lowpoly mesh.
2. Normal map which I painted in NDO. (as far as I know it's OpenGL Normal)

That's what I'm doing:
1. Export mesh from Maya to fbx. Triangulated, with smoothing groups, with tangents and binormals.
2. In Substance Painter create new project. Select my mesh, check Normal map format to OpenGL, and uncheck "compute tangent space per fragments". Setup resolution to 4k.
3. Accept my normal map to mesh. Looks correct.
https://www.dropbox.com/s/9mg5aoytt6yyeo4/Screenshot_2.png?dl=0
https://www.dropbox.com/s/g91bj3r6sm4ld8r/Screenshot_3.png?dl=0
4. Open baker, setup resolution to 4k, check curvature map, and these are my results for different algorithm:
algorithm: Per Pixel
https://www.dropbox.com/s/2fl04tejw47ct27/Screenshot_31.png?dl=0
https://www.dropbox.com/s/cn67ryryslpp0rb/Screenshot_21.png?dl=0
algorithm: Per Vertex
https://www.dropbox.com/s/78edy6xpuygzbmj/Screenshot_22.png?dl=0
https://www.dropbox.com/s/81c22zjb9nafacy/Screenshot_32.png?dl=0

What am I doing wrong?

Jerc

Would you be able to send me the mesh and normal map via PM?

CrazyBuch

Jerc said:

Would you be able to send me the mesh and normal map via PM?

sure, sent

Jerc

The main issur here is that the only detail you have in your normal is very strong, very thin lines, and the default curvature setting doesn't really work in this case and all the artefacts due to the low poly mesh are overblown.
Reducing the "Details" slider to 0.05 will give you a much cleaner curvature.

CrazyBuch

Jerc said:

The main issur here is that the only detail you have in your normal is very strong, very thin lines, and the default curvature setting doesn't really work in this case and all the artefacts due to the low poly mesh are overblown.
Reducing the "Details" slider to 0.05 will give you a much cleaner curvature.

Thnx a lot! Should I use, in my case, per pixel algorithm? 

musashidan

Per pixel is for baking from a normal map. Per vertex is for baking from geometry. So if using an NM to derive curvature then you would go per pixel.

CrazyBuch

musashidan said:

Per pixel is for baking from a normal map. Per vertex is for baking from geometry. So if using an NM to derive curvature then you would go per pixel.

thank you so much!