I have a quite simple rendering in Cycles, containing some droplets with a standard glass material – only glass node, connected to surface of material node.
The problem is, the glass increases the noise enormously. First Picture with glass:
Second picture for comparison with plain white diffuse material instead of glass:
This is just an extremly simple scene, and it's just rendered with 32 samples for testing purposes.
Is there a way to reduce the noise added by glass material? Please keep in mind, this is not about the noise in glass itself, but about added noise everywhere else.