glFog or depth cueing

Support
1

I couldn’t figure out how in vtk to get a rendering effect like ‘fog’ where things fade as they get farther away from the camera. This is sometimes called ‘depth cueing’ such as in this product…
http://docs.pixologic.com/reference-guide/render/depth-cue/

or this one

Could someone point me to the api steps that would be used to reproduce this effect or access the glFog opengl extension that creates this via vtk?

2

It may be an overkill, but you can actually render volumetric fog by adding a volume rendered actor to the renderer.