Bad normal errors

[MrBigzy]

If you don't see the errors, then the normals are fine.

I'm not sure if this error actually means the normals are not normalized, I remember having the problem before and fixing it somehow. However, if it cannot be fixed and you want to try to fix the normals, you have to normalize them to put them back to a unit vector length (a total length of 1). I dunno about other programs, but for Maya you can do this by going to Display, Polygons, Custom Polygon Display, and then setting normal size to 1. I'm not sure if this will fix the problem or not.

Also as nemesis said, polygons facing the wrong way cause problems, since HPL2 only register single-sided polys, which is why you can't see the texture from the inside of a model. Plus the lighting issues he mentioned. If you want to check the normals in Maya, you can see them by going to the attribute aditor (box on the very right of the screen, make sure the model is selected), going to "Name"Shape, and then mesh component display. At the bottom, check the box that says "display normal". You'll have to check your model for any normals that point inward. To do that, select the faces/vertices (depending on what you want to work with), go to the polygons menu, then Normals, Reverse.