Incorrect depth rendering?

[jo55]

I'm new to all of this and plan on learning as I go so bear with me here.

I've begun using blender and the ROM manager, I feel I have a grip on using blender for basic geometry and texturing (using original Mario 64 textures)

I've successfully imported levels, however there is an issue I can't currently figure out where all the textures can be seen, regardless of if they are behind a wall, including Mario's model, which disappears when he moves over a texture besides his shadow.

I have made sure all faces are pointing out and triangulated but beyond that right now I am lost.

I've watched a number of tutorials but none I found describe or resolve this problem.

Can somebody put me out of my misery with this?

I'm having the same issue. It started happening after I downloaded the update. I'm not sure if that's the reason though.

My older levels are still working fine. However when I try to import a new level, i have this problem now.