Depth Buffer materials in Scene View

"We have some materials that are reliant of a depth buffer to render properly. It's necessary for the artists/designers to see these materials in the scene view, but I'm not finding a way to force the scene view camera to render a depth buffer. Setting it's depthTextureMode seems ineffective. Any ideas?"

I'm afraid currently (Unity 2.6.1) scene view's camera does not render the depth/depthnormals texture.

I will have this fixed for a future Unity release, but that won't happen very soon I think.