I am a fairly new Blender user. I am using Blender 2.63 mainly to create 3D models for a computer game. I have run into a really strange problem with the model lighting: If I create a new cylinder in object mode and apply some textures, than export it and load it in the game, everything works fine.
The moment I start editing the cylinder mesh in edit mode (e.g. cut a hole with the knife tool) some weird shadows and lights appear on the texture, which are also present in the game after exporting the model.
I spent the last three days experimenting, reading forums and searching the web, but I just can't figure out the problem. I dont even know where to look for the problem anymore... and it's starting to drive me crazy. Therefore, any help at all on this topic would be greatly appreciated.