Hi, I am new to modeling and mapping, I have built a model but it isn’t lighting correctly, if you look at the image you can see that there is portion that looks brighter than the rest. My map is just lit with the oasis sky right now. Or is this just because my model sucks?

Here’s my shader, super basic should I need to add anything to this?
models/emperor/pullman
{
qer_editorimage models/emperor/pullman.tga
implicitMap models/emperor/pullman.tga
}