Okay turns out that this has nothing to do with UWXP however the bug stops when I turn the "Draw vortices" option off.
Having this option off fixes everything; clouds drawing through aircraft, cockpit textures showing outside, engine cowling textures going through aircraft and AI aircraft being see-through.
Thanks
Hi there, I have been able to see textures through the model of the aircraft when on the outside view.
I am using XPlane 11.25r2
Attached are some screenshots to better describe the issue.