Thanks for being so patient with me.

I'm confused because on the image I uploaded, the image with the black background is how it rendered on the other computer.

For how I made the model, I sculpted it in a program called Sculptris, found I had FAR too many triangles, reduced the character itself from some million triangles to about 5800. Same for the attachments to the character, except with a much smaller count.

When it was imported into Maya, there were lots of uneven triangles.

I then exported each mesh (about 6 meshes in total) as an obj for Maya, reduced all and combined each on top of the character model to 6000 triangles, then moved the right leg slightly forward and rotated it slightly. Cut the UVs, it rendered how I wanted it on another computer (like in the picture in the bottom right corner), but when trying the same uv map and model on my own computer, I get messed up results (like all pictures on the left)