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Rendering with Arnold in CINEMA 4D using the C4DtoA plug-in.
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Emission channel weird issue C4D

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Message 1 of 9
faura.space
355 Views, 8 Replies

Emission channel weird issue C4D

Hi guys I've updated to 2.2.1 and now always getting strange result in my emission aov. The mesh lights are surrounded by noisy specular highlights and I have no idea where it's coming from as I don't have any emission on this meshes. Also there is no problem when I preview the channel aov in ipr, this problem only appears when I render to tiff/exr. Any ideas?!

480-screen-shot-2017-11-24-at-195838.jpg

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8 REPLIES 8
Message 2 of 9
Stephen.Blair
in reply to: faura.space

You have specular highlights in the emission AOV? I can't repro that, can you post a simple example scene or ass file?



// Stephen Blair
// Arnold Renderer Support
Message 3 of 9
faura.space
in reply to: faura.space

I have some weird thing that looks like spec highlights in emission channel, but I have no idea what's that.

Message 4 of 9
faura.space
in reply to: faura.space

Message 5 of 9
faura.space
in reply to: faura.space

I was digging in the problem and found out that it's a transmission channel in standart_surface is causing the trouble. The transmission is catching the light from a nearby sources and transferring it to emission channel! Damn, have no idea whats that, seem like a bug.

Message 6 of 9
faura.space
in reply to: faura.space

@Stephen Blair Any solution, man?

Message 7 of 9

Seems to be a bug, indeed, we're looking into it.

Weirdly if you create a custom AOV with the light path expression C[LO], that seems to work.

501-custom-emission-aov.png

Message 8 of 9
faura.space
in reply to: faura.space

@Peter Horvath Awesome! That worked. Thank you!

Message 9 of 9

I have found the bug, it will be fixed in the next release.

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