Hi,
I have a big tree >700.000 poly.
I have converted both model as VRay and Corona Proxy.
So, in my scene I have only a plane (ground) and the two proxy (VRay and Corona)
If I "paint" the VRayProxy over the ground, the speed is ok (40 FPS)
If I "paint" the CoronaProxy over the ground, I have 2 FPS.
Conclusion: I cannot use this tool with CoronaProxy. There is some issue in the CoronaProxy management
Also, I cannot change the CoronaProxy WireColor. This is very useful for complex scenes