Hi,
i am getting strange artefacts (negative values) in rendering glass materials (Material_Specular), and i cant nail it down what causing the issue.
path tracing kernel, texture environment (polyhaven .hdr).
octane 2024.1.2.0, houdini 20.5.445
Strange Reflection/Refraction Artefacts - Negative Values
Moderator: juanjgon
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ricky_otoy
- Posts: 289
- Joined: Mon Jun 19, 2023 6:34 am
Please can you supply a sample?
It is generally from something that is "overbright" in this case probably some pixels or parts of the hdr too. Sometimes slightly blurring the hdr in PS helps.
Alternatively, you can reduce your GI clamp value way down.
It is generally from something that is "overbright" in this case probably some pixels or parts of the hdr too. Sometimes slightly blurring the hdr in PS helps.
Alternatively, you can reduce your GI clamp value way down.
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nospitters
- Posts: 20
- Joined: Wed Jul 18, 2012 12:00 pm
hi ricky,
thx for the reply.
i also thought about the hdr as the cause of the issue, but switching the env to daylight, gives me similiar issues.
the GI is already clamped to 10 (instead of 1e-10 as the default) and setting this way down to 1 doesnt help...
by changing the material to a standard helps to get less to none visible artefacts, but they are there in the AOVs (reflection + refrection).
i can provide a sample file asap.
thx for the reply.
i also thought about the hdr as the cause of the issue, but switching the env to daylight, gives me similiar issues.
the GI is already clamped to 10 (instead of 1e-10 as the default) and setting this way down to 1 doesnt help...
by changing the material to a standard helps to get less to none visible artefacts, but they are there in the AOVs (reflection + refrection).
i can provide a sample file asap.