What elements of an FVF 338 do I need to change? Don't I have to do something with the normals in each vertex element or just move them in relation to the vertex positions? There are 36 bytes worth of data in each vertex element including the XYZ position, the Normal XYZ, Diffuse color, and UV coordinates. I've tried taking the average of each DWORD of the physical coordinates and normals but I get garbage... so I am changing the mesh but things that are not different in the mesh are changing. I'm probably asking something a bit more advanced than beginner level stuff. I just thought it wasn't advanced enough to ask in the other forums as my questions never get answered there. I thought they are just not advanced enough for the main DBPro forum. Then again maybe no one knows so they don't post a response. I don't expect everyone to respond with "Me no know!".
EDIT!
The answer was simple enough and I'm almost sorry for wasting space here. I was infact using Memblock DWORD when it should have been Memblock FLOAT. Thanks for responding anyway! Oh, and in fact I found out that I should interpolate each float except for the diffuse colors.