Hi Ceciliabr,
Sunflow standalone allows the use of bump/normal mapping via modifiers. (example bump_demo.sc)
The .obj format also allows the use of bump mapping by adding the 'map_bump' or 'bump' keyword followed by the texture path in the .mtl file.
Unfortunately, Sweet Home 3D only takes into account the 'map_Kd' keyword in the export/import OBJ.
Enko
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EnkoNyito
