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Low Aperture Causes Glitches
Posted: Mon Jul 04, 2022 9:50 am
by smuseus
Octane glitches when rendering at very low camera aperture settings, see attached screenshot.
Changing the near/far clipping does not make any difference.
Re: Low Aperture Causes Glitches
Posted: Mon Jul 04, 2022 12:14 pm
by elsksa
Hi,
There is currently no Octane core DoF issue like this one, as far as I know.
I'm not an Octane-Houdini user.
However, this the Camera tab from Houdini, not the Octane Camera Properties. I would suspect that it has to do with it.
Re: Low Aperture Causes Glitches
Posted: Mon Jul 04, 2022 12:25 pm
by juanjgon
Can you please check if the ray epsilon parameter available in the render target kernel nodes tab helps?
Thanks,
-Juanjo
Re: Low Aperture Causes Glitches
Posted: Wed Jul 06, 2022 12:53 pm
by smuseus
Tuning the ray epsilon did work, but I'm animating the aperture so this requires animating the ray epsilon as well as creating multiple copies of the render target since I'm sharing that between my ROPs.. not great tbh.
Re: Low Aperture Causes Glitches
Posted: Wed Jul 06, 2022 1:20 pm
by elsksa
smuseus wrote:Tuning the ray epsilon did work
I'd like to emphasize on the importance of appropriately changing the Ray Epsilon value, which often does imply either:
• an incorrect scene scale: it's recommended that the whole scene or object(s) have to be correctly re-scaled and it's highly recommended to avoid relying on the Ray Epsilon as "solution" ("fix"), in this case.
• a project with a large scene, where Ray Epsilon is indeed the option to adjust.
Due to, basically, GPU scene floating point precision (not exclusive to Octane).