PhotonGI cache

[B.Y.O.B.]

I have exposed the maxsize property again.

[Sharlybg]

Ok a simple recap of the situation and upcoming feature and Speed.

PhotonGI + OIDN + 7nm(GPU+CPU) + Topaz Ai Gigapixel =

Never mind one day that Luxcore = Skynet

[Dade]

Post a (simple) test scene, pls.

This actually is a simple testscene....

Just use the debug option to directly visualize the direct cache and you will understand a lot (this is the second scene camera, the first one is even worse):

This seems the result of a BlendLuxCore bug, it doesn't set the direct cache size (and the default value is very small). It should be set to something like: 2 * <indirect cache size> / <max. photon path depth>

The correct output:

Not say that this fix everything but having a direct light cache with something inside helps

[B.Y.O.B.]

Why the direct cache? Isn't it supposed to be disabled?

It should be set to something like: 2 * <indirect cache size> / <max. photon path depth>

I tried to do this but the direct cache debug output is completely black on all surfaces.
When I enable it with "path.photongi.direct.enabled = 1" I can see the same output as in your post, but when I switch debug mode off, the render is full of direct light cache splotches. I'm confused.

[Dade]

Why the direct cache? Isn't it supposed to be disabled?

It should be set to something like: 2 * <indirect cache size> / <max. photon path depth>

I tried to do this but the direct cache debug output is completely black on all surfaces.
When I enable it with "path.photongi.direct.enabled = 1" I can see the same output as in your post, but when I switch debug mode off, the render is full of direct light cache splotches. I'm confused.

Yes, for the debug, and only for the debug, you have to use "path.photongi.direct.enabled = 1":

- debug on enable the related cache => "path.photongi.direct/indirect/caustic.enabled = 1"

- debug off, keep direct cache disabled => "path.photongi.direct.enabled = 0"

[B.Y.O.B.]

I fixed the problem: https://github.com/LuxCoreRender/BlendL ... 5d6d8f06e2

[lacilaci]

Trying the latest builds... I cannot do anything to avoid those corner "leaks"

Btw, will the cache work with bidir too?

[Dade]

Btw, will the cache work with bidir too?

Nope, it not applicable in that context (BiDir traces a light path for every sample, if you cache the light path ... it just becomes path tracing + cache).

[lacilaci]

Btw, will the cache work with bidir too?

Nope, it not applicable in that context (BiDir traces a light path for every sample, if you cache the light path ... it just becomes path tracing + cache).

then maybe some pathguiding for bidir?

[Dade]

Btw, will the cache work with bidir too?

Nope, it not applicable in that context (BiDir traces a light path for every sample, if you cache the light path ... it just becomes path tracing + cache).

then maybe some pathguiding for bidir?

Yes, that would be a possibility.