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Rendering

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Marc LucasRendering
by on Jul 22, 2014 at 2:39:24 pm

I have a 50 frame render with GI and when I render the whole 50 frames at once I get black blotches in the render. However if I render the sequence 10 frames at a time it renders OK. Very confused.






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Adam TrachtenbergRe: Rendering
by on Jul 22, 2014 at 2:51:20 pm

Need more information. What version of Cinema? Is the camera animated? Are objects other than the camera animated? What GI settings are you using? Standard render or physical?


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Marc LucasRe: Rendering
by on Jul 22, 2014 at 2:57:56 pm

Mixture of Camera animation and animation of an object. C4D 14
Standard Renderer I have the GI setting set to diffuse depth 5, Primary and secondary 100% (I know that high but I thought just try and increase to affect the quality. GI Mode: IR+QMC
Sampling set to medium. Here's another screen grab of one of the frames in the render.




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Adam TrachtenbergRe: Rendering
by on Jul 22, 2014 at 3:10:05 pm

Are you using GI method: IR + QMC (full animation)? If not, that's what you'll need.

This looks like IR cache errors. If you don't use the full animation preset the IR cache won't account for object movement so you'll be missing shading points when the object moves.

Another option is to use QMC only.


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Marc LucasRe: Rendering
by on Jul 22, 2014 at 3:13:50 pm

Yes using IR + QMC

I'll try with just QMC and see if it does any better


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Marc LucasRe: Rendering
by on Jul 22, 2014 at 3:15:37 pm

Can I empty the cache would that help in any way?


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Adam TrachtenbergRe: Rendering
by on Jul 22, 2014 at 3:33:11 pm

Cache doesn't work with QMC but you can enable Radiosity Maps (in the sampling tab) which usually speeds things up a little.


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Marc LucasRe: Rendering
by on Jul 23, 2014 at 10:58:17 am

I've done it QMC and it seems to be fine. Thanks for your help on this Adam I appreciate it.


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Adam TrachtenbergRe: Rendering
by on Jul 23, 2014 at 3:54:22 pm

No problem. QMC can be slow but it's the most accurate and trouble-free GI method.


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