New to BSE; new to Blender.
I've imported a fairly complicated .stp model into Blender and successfully produced some renders using Cycles.
Now I want to produce a cross section of the model to show the detail inside. In the viewport I'm achieving what I want using the Camera Clipping Distance.
When I render the scene, using Cycles, the interior parts which are exposed by the clipping distance are extremely dark, i.e. black.
I have a sun and couple of hemi lights outside the model. I tried moving a light inside the model but it didn't seem to change anything.
Can anyone help me how to avoid this or how to light the scene correctly.