overbrights

[tigrazone]

I have a scene which rendered overbright. Is it posible to autoexposure or use all lights power for automatically balance of lights in scene. In sky mode all looks ok

But when I upload HDRI and also when I set intensity to 0 - I have overbright

Looks like an issue

[tigrazone]

one more case of this issue - sun disk scale = 0 or sun disk intensity = 0 make overbrights

[tigrazone]

one more scene with emissive textures with HDRI on

HDRI off

[mklefrancois]

Have you tried the tonemappers ?

[tigrazone]

tone mappers doesnt helps. emissive area lights not calculated in MIS well. in code processed hdris and punctual lights, not area lights

[mklefrancois]

The scene has indeed very strong lights, which I believe doesn't follow the rule of the intensity parameter, which is lumens per steradian (lm/sr).

There are a few things which can be done:

• Increase "Max Luminance", which is controlling the Firefly Filter and is cutting out incoming energy.
• Reduce the Tonemapper exposure to compensate the over bright lights
• Set the sun elevation to -90 deg, to remove any contribution from the Physical Sun & Sky model. Changing the Disk Scale is not physically correct, but a user control was added for "artistical effect", but only the 1.0 value is correct.

Same is true for the SciFi scene

[tigrazone]

thank you for explaination. is this parameters can be automatic processed? for example, "auto exposure" which can measure max luminance and fit parameters?

[mklefrancois]

An auto-exposure can be done, but to properly do this, we need the inverse of the tonemapper in use. We do not plan this feature in the short term.