Could anyone tell me if it's possible to fix this please?

I'm making a recolour of the value door:


If I tilt it at a certain angle the back of the doorframe shows through:


I mean this bit at the bottom, I want the window frames and net to show at the back:


I'm sure I figured out how to solve this type of thing, but I have since forgotten (stoopid simsample). I have stdmatcullmode set to off which is why the back face shows, but the doorframe showing happens with it set to cullclockwise too.

If you've also used the "Blend" mode (for transparency in the windows?) - this can mess a bit with opaque parts of the texture, and sometimes causes it to go partly see-through or cut off from some angles. I tend to prefer using this one in a separate group whenever possible.

@simmer22 Thanks for your help, I worked on it some more using a mesh with two groups and it looks much better.

It does
(The recolor looks really nice, and it's a neat idea with those see-through windows. Are you planning to share at any point?)

Thanks! It's a rough copy of a door from Sims 1:



I'm using CycloneSue's industrial door master mesh, it has a seperate group for the frame colour and no handle. But- it doesn't have an interior thickness like the value door does, so I can't get the 'double glazed' effect that I liked (it's a rectangle rather than a cuboid). I'll keep looking out for another mesh that is similar but cuboidal. I don't know if it's good enough to share officialy, but if anyone wants it they can PM me and I'll send it!