Smoke with DOF

Discussion and Support of Krakatoa Volumetric Particle Renderer for CINEMA 4D on Mac OSX and Microsoft Windows
Bobbyd
Posts: 17
Joined: Sun Nov 30, 2014 4:23 pm

Smoke with DOF

Postby Bobbyd » Thu Jun 01, 2017 8:51 am

Hi Guys
Here's a render I've been working on - I'm pleased with the result and the bullet time look.
https://youtu.be/OsrfOhHUX2U
One thing that's a bit weird though - The alpha channel is messed up. Where the DOF is at its most blurry there doesn't seem to be any transparency information at all. Is this a known problem / issue?
Cheers
Bob

Evan Spearman
Posts: 39
Joined: Wed Jan 20, 2016 2:25 pm

Re: Smoke with DOF

Postby Evan Spearman » Thu Jun 01, 2017 10:41 am

Hi. Was this rendered using additive mode? Krakatoa doesn't write any data to the alpha channel when in additive mode.
That said, there was a bug in some older versions where the blue channel was written to the alpha channel. If you're seeing data written to the alpha channel for some particles, but not others, that might be the cause.
Evan Spearman
Developer
Thinkbox Software

Bobbyd
Posts: 17
Joined: Sun Nov 30, 2014 4:23 pm

Re: Smoke with DOF

Postby Bobbyd » Thu Jun 01, 2017 11:04 am

Ah, thanks Evan, that explains it.
Yes, I rendered them in additive mode, and yes, it's an older version of Krakatoa (2versions back I think).
Cheers.
Bob


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