10/23/2023 0 Comments Open skp file![]() If you download models from the warehouse, you get what you pay for. It's easy to spot back facing primitives if you don't slather your model up with materials. As you model you really need to be aware of primitive orientation and that is why they have RMB menus on the primitives to control this, similar to Houdini's Facet SOP and it's auto orient feature. Default 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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