LuxCoreRender Forums

I have exposed the maxsize property again.

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

lacilaci wrote: Wed Feb 06, 2019 1:13 pm

Dade wrote: Wed Feb 06, 2019 1:00 pm 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

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

Dade wrote: Wed Feb 06, 2019 4:58 pm 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.

B.Y.O.B. wrote: Wed Feb 06, 2019 5:28 pm Why the direct cache? Isn't it supposed to be disabled?

Dade wrote: Wed Feb 06, 2019 4:58 pm 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"

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

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

Btw, will the cache work with bidir too?

lacilaci wrote: Thu Feb 07, 2019 12:12 pm 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).

Dade wrote: Thu Feb 07, 2019 5:32 pm

lacilaci wrote: Thu Feb 07, 2019 12:12 pm 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?

lacilaci wrote: Thu Feb 07, 2019 5:42 pm

Dade wrote: Thu Feb 07, 2019 5:32 pm

lacilaci wrote: Thu Feb 07, 2019 12:12 pm 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.