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35-hr Preparation Time
Hi,
I’ve created a 200 frame scene at 1920×1080, with a little moDynamic of 800 spheres which fly past the camera to form to create some text. There’s a little ambient occlusion for shadow and a HDR map for a little reflection from the balls. GI is on, but mostly on low settings.
I’m using a 2.8 i7 iMac, 8Gb RAM, running snow leopard 10.6.4 and C4D 11.5. I’ve had the preparation time now reach 35 hours and it’s still not finished, although I’m pretty sure it’s about 2/3 of the way through. I can’t see a frame number listed there to tell exactly where it’s at.
Basically, I’m just wondering if this is a normal time for this type of render. Seeing as it’s still preparing after 35 hours! I really need this animation for a job application……….for every day spent rendering, they’re receiving more and more applications, and none of those are mine!
I’m definitely getting the new Mac Pro when Apple finally decide to release it. Roll on the 12-core machine!! 🙂
Any advice would be greatly appreciated…………..many thanks!
Jack -
3 Replies
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Sounds like you are rendering to a movie. I am rather new at this, but my experience has been rather to render out to an image sequence (targa works well for the most part with lower file sizes). Global illumination is great, but for creating movies, there is a lot of preparation involved. By going with an image sequence, it spends a lot less time looking at the overall sequence and focuses on individual frames. But that is just my experience. Hope this helps.
Tim
Tim
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The excessive time is almost certainly down to the combination of GI and, large render size, and reflection. When you think about it, all of those spheres are reflecting the whole scene, including each other, and the reflections are bouncing back and forth — like the mirror hall effect. That’s causing the GI to have to do massive calculations.
I think your render times will increase dramatically if you go to the reflective material and disable the generate and receive GI checkboxes (illumination tab). Of course that could have an undesireable effect if the spheres are only slightly reflective….
You might also check the render instances box in the cloner if you haven’t already.
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There are no amount of ‘thank you’s I can offer that will express my gratitude! 🙂
The generate and receive GI on the illumination was exactly it. And to be honest, I can’t see that much of a difference in the renders. The preparation is now flying along. It was doing about one frame every hour, and total time was up to 57 hours!I’ve learnt a lot through this!
Many thanks!
Jack
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