render/viewport background that doesn't affect scene lighting?

[stayinwonderland]

I've wondered about this for ages.

 

Let's say I have a scene lit by HRDI using vray sky and dome.

 

Whether the environment map slot is used or the dome has a HDRI image in it, we will see that in the render background. Is it possible to replace the background with a seperate image that won't disturb the light setup?

[stayinwonderland]

Ok I reckon I've got it. Use your dome HDRI image but still put an image in the environment slot and check 'invisible' in the dome set up.