Bad normal errors

[plutomaniac]

I am full of these things especially with complex converted models. It can be fixed but modeling skills are required to fix these before you export the model in .dae format. MrBigz told me one week ago what these are but I cannot remember more details.

1) It makes loading slower, I know that from experience.
2) To edit the normals of the custom model so that their length is the normal, 1.