6/14/2023 0 Comments Open skp fileDefault is white for +ve and a bluish grey for backward -ve faces. Nice thing in SketchUP is that they automatically support two sided shaders on primitive faces in OpenGL. I have gotten models from most applications where prim normals were all over the place. Btw it isn't SketchUP but it's the modellers who construct geometry with primitives with opposite winding on shared points causing inverted primitive normals. Oh yes you have to be very well aware in SketchUP which direction your prims are facing.
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