LuxCoreRender Forums

Very helpful tip Sharlybg, you answer to lacilaci question. I think the yellowish on my scene is nice to recreate sunset mood

Peperepe77 wrote: ↑Sat Jun 15, 2019 2:15 pm My scene is lit with Hdri https://hdrihaven.com/hdri/?c=sunrise-s ... it_sunrise

So no sun light, only HDRI (with its embedded sun)?

No embeded sun i think. Hdri haven HDRI produce sharp shadow by its own.
Btw i don't really understand how the SIBL lighting system work. On the w3bsite it is said that it is intended to produce fast convergence fast render.

Sharlybg wrote: ↑Sat Jun 15, 2019 6:27 pm Btw i don't really understand how the SIBL lighting system work. On the w3bsite it is said that it is intended to produce fast convergence fast render.

It a simple trick, it uses an high resolution image when it is directly visible and a low resolution image for all other rays. It usually results in a softer lighting and faster rendering without the draw back of a low resolution background.

P.S. it requires explicit support by the rendering engine.

Yes BYOB only hdri, ther isn't sun lamp.