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Bright spots when using night HDRIs

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Bright spots when using night HDRIs

Unread postby Karen_Jonhson » Thu Jun 25, 2020 2:50 pm

Bright spots appear when using concrete_slab material from Megascans and lighting it with night HDRIs from HDRIhaven.
When it's a flat environment light (no IBL), or the IBL is daylight, I don't see the bight spots.
The HDRI texture map is defined in File color space as [Utility - Linear - sRGB]
Any idea what might be causing these?
I attach screen prints of the night HDRI render (using moonless golf HDRI), then the day HDRI render with no issues, then the original material from megascans.
Attachments
moonless golf.JPG
spiaggia_di_mondello.JPG
concrete slab.JPG
concrete slab.JPG (40.73 KiB) Viewed 1003 times
Last edited by Karen_Jonhson on Thu Jun 25, 2020 2:55 pm, edited 2 times in total.
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Re: Bright spots when using night HDRIs

Unread postby Karen_Jonhson » Thu Jun 25, 2020 2:53 pm

more renders with night HDRIs (satara night, Hansaplatz, Kloppenheim 02)
Attachments
satara night.JPG
Hansaplatz.JPG
Kloppenhein 02.JPG
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Re: Bright spots when using night HDRIs

Unread postby dboude » Thu Jun 25, 2020 3:48 pm

Hard to say,

Maybe a specular lobe with no roughness in the material.

Could you share your project please ?

Thank you

Cheers
Démian
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Technical Artist - Clarisse Specialist
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Re: Bright spots when using night HDRIs

Unread postby esmith » Tue Jun 30, 2020 12:09 am

Check some aovs like Glossy and Specular to find out what these are. I can't tell from the image if it's just a sample issue or what.

But you can try this quickly to see if it helps you
https://www.clarissewiki.com/4.0/firefl ... ering.html
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