"Allow caustics": wrong brightness on caustics at Photon

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"Allow caustics": wrong brightness on caustics at Photon

Postby nuno1980 » Fri Mar 17, 2023 10:21 am

nuno1980 Fri Mar 17, 2023 10:21 am
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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Re: "Allow caustics": wrong brightness on caustics at Photon

Postby elsksa » Fri Mar 17, 2023 1:42 pm

elsksa Fri Mar 17, 2023 1:42 pm
It does appear to simply be the expected increased incoming light from the Photon Tracing caustics convergence.
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Re: "Allow caustics": wrong brightness on caustics at Photon

Postby nuno1980 » Fri Mar 17, 2023 4:05 pm

nuno1980 Fri Mar 17, 2023 4:05 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 10 dollars US or 10 euros for 22.5 hours of render time - RTX 4090 + electricity's cost. ;)
NOTE: I'm sorry for bad english due to mute ;)

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