HDRI & Gain setting

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S0rda
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HDRI & Gain setting

Post by S0rda » Mon Sep 02, 2019 12:22 pm

Hi, with HDRi, the "Gain" parameter does not have any effect in the viewport (switching the viewport after changing the setting also has no result). Is that what you intended? It seemed to me that this parameter should make the scene (the light of the environment map) brighter / dimmer?

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lacilaci
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Re: HDRI & Gain setting

Post by lacilaci » Mon Sep 02, 2019 12:40 pm

S0rda wrote:
Mon Sep 02, 2019 12:22 pm
Hi, with HDRi, the "Gain" parameter does not have any effect in the viewport (switching the viewport after changing the setting also has no result). Is that what you intended? It seemed to me that this parameter should make the scene (the light of the environment map) brighter / dimmer?
create a camera and in camera settings find auto exposure and disable it. By default luxcore has this setting enabled.
If it isn't this problem then I don't know.

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B.Y.O.B.
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Re: HDRI & Gain setting

Post by B.Y.O.B. » Mon Sep 02, 2019 12:51 pm

As lacilaci said, the auto tonemapping is probably compensating for the brightness change of the HDRI.

S0rda
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Re: HDRI & Gain setting

Post by S0rda » Mon Sep 02, 2019 1:02 pm

lacilaci wrote:
Mon Sep 02, 2019 12:40 pm
create a camera and in camera settings find auto exposure and disable it. By default luxcore has this setting enabled.
If it isn't this problem then I don't know.
+

Okay, that worked. That's just what I wrote, was manifested in a free (off-camera) preview of the render. Turning off the automatic brightness adjustment for the last camera that I use, in the "free" viewport, the gain parameter also began to influence. It seems a little strange to me that the camera settings affect the viewport without a camera.

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lacilaci
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Re: HDRI & Gain setting

Post by lacilaci » Mon Sep 02, 2019 1:07 pm

S0rda wrote:
Mon Sep 02, 2019 1:02 pm
lacilaci wrote:
Mon Sep 02, 2019 12:40 pm
create a camera and in camera settings find auto exposure and disable it. By default luxcore has this setting enabled.
If it isn't this problem then I don't know.
It seems a little strange to me that the camera settings affect the viewport without a camera.
It's a default behavior.. I like the autoexposure feature a lot but I'm too not sure it should be on by default

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