Okay so I made an indoor map with no windows. Its completly enclosed and I got it past tool but when I edit the shaders and add a sky I add the sky from the map Underpass and open it in sapien but there is no sky. Do I need to make a box around the model and give it a name of +sky?

Ummm I was told there needs to be a sky.

So how do I see in sapien?

A good way to add lights to a indoor map is to model a light fixture & give it a shader that has illumination properties, a example shader is the flourescent.shader_environment tag. It is located in levels/a10/shaders. Use this to add basic lights to your map.