Recently i was doing some test to find a way to deeply reduce render time in Interior rendering. So i tried to find what slow down interior render. The principle is quite simple :
If light source is easy to find , not hiden and bouncing through cumbersome geometry then the render is bloodly fast. This is why outdoor are so fast. So i decied to create a realistic kitchen lit by AREA light only. And i got fast render and decide to compare with HDR lighting :
AREA 1024 samples 3.12mn ( 1080 Ti)
HDR 1024 samples 3.0mn ( 1080 Ti)
AREA is by far cleanner but HDR is the most natural/realistic. So i wonder how we can combine the best of theses to ways. I already know about Portals. And while reading an Fstorm tutorial i found this :
https://www.behance.net/gallery/4598523 ... m-Tutorial
As Vray or Corona, Fstorm has a portal system. He is very used to illuminate interiors in order to collect many more photons.
In Fstorm, It just to create a plane, glued of the borders of your wall at the level of the framing of your windows.
Be careful to orient the normal of your plane pointed inside. Then apply a "FstormPortal" material. Then you can manage the power of your portal from the material.
For my project, I used a portal with 5 power.
I said to myself maybe portals power in Fstorm is like importance in Luxcore and i feel like not the case.
Also bertrand said this while testing Fstorm :
When you add to this that Fstorm don't support any form of Denoiser.I initially found FStorm to be slow for a GPU renderer when rendering interiors, but this was before I placed portals in my windows. This sped things up considerably. It’s been years since I had to work with portals in any renderer, so it felt strange to go back to them. But why not. They certainly work well here.
I could generate final 2K images in about an hour each on a single 1080ti.
So i decied to see if we can't make an Area light to behave like HDRi in real life and Found this :
An ITALIAN scientist create a wonderful artificial light panel that mimic real daylight sun. Strangely they name is CoeLux
My question is : Is it possible to :
1/ Create a numeric version of coelux panel ?
2/ is it possible that this speed up rendering ?