I have never tried the combo shadow catcher and DLSC, I'm going to check what is going on.
LuxCoreRender v2.1alpha2 released
Re: LuxCoreRender v2.1alpha2 released
About the filtering of the lightcache samples, I mean something that can smooth the image area like the one you see over the table in this image.
http://forums.luxcorerender.org/downloa ... &mode=view
It seems that there are some "circle" with different brightness and I'm thinking to something that bring some samples with a distance rule and smooth together to smooth the transition from a "circle" to another one.
Is it something that had sense?
http://forums.luxcorerender.org/downloa ... &mode=view
It seems that there are some "circle" with different brightness and I'm thinking to something that bring some samples with a distance rule and smooth together to smooth the transition from a "circle" to another one.
Is it something that had sense?
Re: LuxCoreRender v2.1alpha2 released
As far as I understand it, the light cache only adjusts the probabilities of a light being sampled and is still unbiased.
The phenomenon in the linked image might be startup bias or something else caused by not enough samples (but it is a bit hard to tell without a ground truth image).
The phenomenon in the linked image might be startup bias or something else caused by not enough samples (but it is a bit hard to tell without a ground truth image).
Re: LuxCoreRender v2.1alpha2 released
Correct.
It is noise, a (huge) different level of noise. DLSC fallback to standard log power light strategy when a valid cache entry is not avilable for the point I'm rendering. It is very noticeable. Look, this is a scene with a well populated cache (1 sample per pixel):
and this is the same scene with not enough cache entries:
The surfaces without a valid cache entry are very easy to spot due the HUGE difference in noise. It is still unbiased so it will converge to the same result but in practice they look as artifacts.
Re: LuxCoreRender v2.1alpha2 released
So probably it's not something like the Vray lightcache
https://docs.chaosgroup.com/display/VRA ... e+Settings
In that doc there is the "pre-filter" explanation
"Pre-filter – When enabled, the samples in the light cache are filtered before rendering. Note that this is different from the normal light cache filtering controlled by the Filter parameter, which happens during rendering. Prefiltering is performed by examining each sample in turn, and modifying it so that it represents the average of the given number of nearby samples. More prefilter samples mean a blurrier and less noisy light cache. Prefiltering is computed only once after a new light cache is computed or loaded from disk."
I know that Dade that you don't have the vray source code ( ) so my question is a bit useless but do you think it's completely another kind of algorithm?
https://docs.chaosgroup.com/display/VRA ... e+Settings
In that doc there is the "pre-filter" explanation
"Pre-filter – When enabled, the samples in the light cache are filtered before rendering. Note that this is different from the normal light cache filtering controlled by the Filter parameter, which happens during rendering. Prefiltering is performed by examining each sample in turn, and modifying it so that it represents the average of the given number of nearby samples. More prefilter samples mean a blurrier and less noisy light cache. Prefiltering is computed only once after a new light cache is computed or loaded from disk."
I know that Dade that you don't have the vray source code ( ) so my question is a bit useless but do you think it's completely another kind of algorithm?
Re: LuxCoreRender v2.1alpha2 released
It is different, V-ray sounds like a classic photon mapping where you can use the photon map to render direct light. Like B.Y.O.B. wrote, DLSC is only changing the probability to sample specific lights.
Re: LuxCoreRender v2.1alpha2 released
After further tests i found it's a corner case. Happens only when both: Sun & World (HDRI, Sky or Flat Color) are used at the same time. Separately everything works as expected. & Those artifacts look like are from samples only on shadow's edges.
e.g. EDIT1
Oh, i should have pay more attention - i assume it's related to:
@ DLSC (aka LC pt.I)
TYVM for the great work and effort you put into.
Re: LuxCoreRender v2.1alpha2 released
The v2.1alpha2 crashes with 2 hemi HDRi light maps, DLC on or off.
Re: LuxCoreRender v2.1alpha2 released
Using two hemis with HDRI works here.
It would be good if you open a new thread in the user support section or a github issue and add the following:
- a small scene that shows the problem
- which OS are you using?
- Does it happen in final render or in viewport, or in both?
- which engine are you using (OpenCL or CPU)?
It would be good if you open a new thread in the user support section or a github issue and add the following:
- a small scene that shows the problem
- which OS are you using?
- Does it happen in final render or in viewport, or in both?
- which engine are you using (OpenCL or CPU)?
Re: LuxCoreRender v2.1alpha2 released
I have recreated the scene and now i can't replicate the crash anymore.
Sorry B.Y.O.B
Sorry B.Y.O.B