Hi, I want to discuss meshlight sampling in Corona.
VRay have samples spinner, Corona doesn't. Cleaner UI, faster setup and so on, I know. But there is one problem with meshlight.
I'm not sure that I'm totally understand Corona sampling algorythm, but it seems that one single mesh have the same priority as one light source (it's called light group). That's nice and right in some situations and maybe in most situations, but when you have single ceiling backlight mesh that goes through big scene, then you have very very undersampled direct light from this meshlight.
Increasing Light Samples Mult is not optimal solution because it oversamples other lights, and I got undersampled gi-glosy as result.
There is one stupid solution for now - detach all polys of this mesh, so each one will be sampled like one light source. Do I need to tell that this is very uncomfortable way to work with meshlights? :) For example, I have Line->Sweep and I can edit this mesh easilly by editing Line. Editing of line that made of detached polys is a big butthurt.
I understand that simple UI and easy workflow is Corona's priority and I love that. But detaching polys to get proper sampling isn't simple and intuitive way. Maybe one more checkbox in CoronaLightMaterial won't ruin UI?