Bad shading problem in substance painter

matibuc

Hi everyone,

I'm having a bad shading error in Iray render that i cant explain.

Is visible only in Iray, in paint mode i do not have any problem.

The mesh has benn exported from Blender with the faces smothed and in fact the same mesh in blender does not cause any shading issue. Aloso if i give one more subdivision level to the mesh and i apply it, the mesh still give this weird shading issue in Iray.

As you can see the mesh is rather dense, so i cant figure out which could be the problem.

Thanks in advance to everybody.