[AlexP]

https://coronarenderer.freshdesk.com/su ... plier-lsm-
https://coronarenderer.freshdesk.com/su ... in-corona-

LSM seem to be really useful, I often run into noisy GI and clean direct light.

[dariolanza]

Hello AlexP,

In fact it is typical that the indirect GI is noisier (because of the longer bounces a ray needs to reach the light source) while direct lighting is cleaner.

In Maxwell, the sampling of a light depends on its accessibility. If the light source is less accessible from certain given point, it needs more random bounced to find that light source to determine which color does it provide, so the calculations are longer.
Instead, big and well accessible light sources are always fast light, and your render will look clean in a very short time.
This is why exterior renders with open environment (big and easy to find) are way faster than interior with harder to find lamps.

Direct light --> fast and clean light
Indirect light --> slow and noisy light

As a general rule, make your emitters as low poly, big and accessible as you can. In fact it is usual to have certain big accessible emitters hidden to camera to get a clean render.

I would strongly suggest you to follow these photographers advises to speed up interior renders like the ones in the page you are indicating:
http://support.nextlimit.com/display/tu ... or+renders

However, adding rendering controls like LSM is the kind of technical things we don't want to have in Maxwell, and the kind of things that easily breaks Maxwell natural thinking and ease of use.

Greetings

Dario Lanza

[Gary]

Hello Dario,

Can you please clarify. when you say "make your emitters as low poly, big and accessible as you can", are you saying if I have a triangle emitter that is not visible to the camera, I will get better results if it is larger triangle vs. smaller triangle?

Thanks,

Gary

[AlexP]

But putting emitters in windows or on the floor is same way of faking as putting portals (moreover portals do not change overall look).
Absence of technical render controls is really good thing, but e.g. "priority for GI" would be really nice addition to speed interior renders, especially when sun falls inside and makes a lot of noise. Similar would be "light priority" setting in material, now IES are slower then bigger lights and give more noise.

Edit:
http://randomcontrol.com/blog/importanc ... ing-drive/
like this please!