The compiler will automatically nodraw most textures it deems as not being visible, so there's no need to nodraw all non-visible surfaces in most instances. Not much I can do about this, i've tried to get the correct lighting and textures but seamless transitions are pretty difficult. I'll see what I can do in future but it probably won't be much ...what? This area is clipped due to the complex props here, if it was unclipped players could get easily stuck. again... what? ??? I appreciate the feedback but a lot of this is really confusing. Also; you've attached images but not actually put them into any context, so I need to try and match them to what you're trying to say and i'm pretty sure i've got some of them wrong because of this.