It appears that if a textured model does not contain normals, the pipeline tool will just create content with only position/texture coordinates.
You can force it to compute the lighting data by setting “GenerateTangetFrames” to true.This causes the pipeline tool to calculate the normals + tangent + Binormals.
The problem with this is that I only require the normals and I am using large models with a lot of vertex data so the extra tangent/binormal data does kind of matter.
Is there a way to force the pipeline tool to compute normals if they do not exist - to create an XNB with only Position, Normal and Texcoord data?
FYI the source model is an FBX file