[Boris Ulzibat]

It would be great to have per object settings of dirct/indirect illumination/reflection/refraction overriding the global settings.

Like the case when you have a thin glass around an emitter and do not need, say, indirect refraction/illumination for it.

Could be useful for optimisation purposes.

[JTB]

This is probably a good -but not in real world- kind of optimisation methods

[tanguy]

Good POV boris i am agree with you.
Maybe too the possibility to substract from shadow casting an object too.
+1 for your wish

[Boris Ulzibat]

This is probably a good -but not in real world- kind of optimisation methods

Why not? I guess at least it can help the dielectrics clear faster.