"Allow caustics": wrong brightness on caustics at Photon

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nuno1980
Licensed Customer
Posts: 782
Joined: Sat Dec 18, 2010 10:04 pm

Hello.

At Photon Tracing kernel:

- "allow caustics" unchecked on glossy (or specular) material - brightness is correct on caustics
box - allow caustics disabled on glossy material.PNG
- "allow caustics" checked - this increases badly brightness on caustics (variable caustics* only is appearing by path tracing method at less than ~0.3 of roughness on glossy ground) - this is BUG.
box - allow caustics enabled on glossy material.PNG
--> Please should fix the "allow caustics" bugged for avoid the brightness increased for caustics.

* - Learn the "variable caustics" (new)
NOTE: I'm sorry for bad english due to mute ;)

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elsksa
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Posts: 784
Joined: Sat Jul 24, 2021 1:06 am

It does appear to simply be the expected increased incoming light from the Photon Tracing caustics convergence.
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nuno1980
Licensed Customer
Posts: 782
Joined: Sat Dec 18, 2010 10:04 pm

elsksa wrote:It does appear to simply be the expected increased incoming light from the Photon Tracing caustics convergence.
Ok. But see below:

At path tracing kernel only (not photon tracing) - 6 laps of 1MS/px of regions picked = 6MS/px
6 laps of 1M spp of regions picked at small image at PT.png
This is CORRECT brightness. :)

PS: Sorry for this small image rendered. But you want to unlock to full image (1002x602), you can buy it by 5 dollars US or 5 euros for 22.5 hours of render time - RTX 4090 + electricity's cost. ;)
NOTE: I'm sorry for bad english due to mute ;)

i7-12700KF
2x16GB RAM@DDR4-3600
MSI PRO Z690-A DDR4
Zotac GF RTX 4090 <3 :mrgreen:
SSDs OCZ RD400 0.5TB and Crucial 2TB SATA3
HDD 1TB SATA2
LG BD-RE BH16NS40
PSU 1kW
CRT 19" Samtron 19" :|
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