Env. Light Visibility Cache

[lacilaci]

This looks so good!

[Sharlybg]

striking result : something like LUXCORE PATH TRACING TENSOR CORE.

LTX OFF =====>
LTX ON =====>

LOL


More seriously:

It doesn't, it is an additional option (the pre-processing require far more time and memory than the old visibility map, so the old could be still useful).

how many time for this one ? how much additional memory ?

[B.Y.O.B.]

I'm working on the integration in BlendLuxCore.
It seems that when enabling both vismap + vismapcache, only the latter is computed, is that correct?
Should I expose this as three exclusive radio buttons in the UI?
- nothing
- vismap
- vismapcache

By the way, here's a comparison of the three (direct light only, 10 samples each):

[marcatore]

well...for that specific case it's fantastic...

I hope we'll benefit both on other complex situation.
Anyway, everything will help to have a better and cleaner image is more than welcome.

[lacilaci]

I'm still seeing those artifacts that look almost like jpeg compression artifacts.. do they go eventually away?
Also is this stable across frames? Would it cause flickering?... so many questions, but it definitely looks to be on par with how well portals work in other renderers

[Dade]

I'm working on the integration in BlendLuxCore.
It seems that when enabling both vismap + vismapcache, only the latter is computed, is that correct?

Yes, vismapcache has precedence over vismap.

Should I expose this as three exclusive radio buttons in the UI?
- nothing
- vismap
- vismapcache

Yes, it is like an escalation:

- nothing, only importance sampling, no additional memory, no pre-processing time;
- vismap, only additional memory for a single map, only pre-processing time for a single map;
- vismapcache, additional memory for multiple maps, pre-processing time for multiple maps;

[Dade]

I'm still seeing those artifacts that look almost like jpeg compression artifacts.. do they go eventually away?

Yes, they should, it is just a different amount of noise due to different chance entry/visual map.

[B.Y.O.B.]

It looks like the cache doesn't work yet with constantinfinite lights (without HDRI)?

(30 sample renders)

[lacilaci]

Oh no, I would hope to get even better result with constant light than hdri (which I rarely use anyway)

[B.Y.O.B.]

Here's the scene.
By the way, I have pushed first support for it in the Blender addon.