Move Corridor in front of surface

[htm.aaa]

I had create a corridor, in the cut area the surface keep rendered above the corridor, how could i solve this problem?

i will be very glad to know what wrong i did.

thank you for helping.

[sinc]

If you are trying to render, you'll have to create a full finish ground surface by pasting your corridor surface into a copy of your EG. Then render only the composite surface.

Right now, you have two surfaces in there, and are probably rendering both of them. So naturally, you can only see the one "on top" - the whole point of rendering is to create something like what you would see in real life, which means you can't see through objects in a rendering.