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View Full Version : rush job nubie question--sky object animation


JoelOtron
10-22-2009, 12:22 PM
rendering a project that has a sky object and 3 area lights, Its an exterior daylight environment with some buildings land and sea.

The camera is the only thing moving for the first 200 frames,

At frame 200 some reflective objects (rotating solar panels) begin to move
The sky date and time parameters are keyframed as well from 200 to 300

I originally ran the first 200 frames as a test using the camera animation option wich rendered somewhat quickly and flicker free in 5 hours.

Since this scene has the 100 frames with object and sky animation at the end, I thought Id take a chance and try an overnight pass using brute force IR+QMC (full animation)
Only params I changed was stoch samples,from high to medium.

At 6 hours in I've got:

Update pass 3 of 13 and its up to frame 41--so looks like Im in for several more hours at best.

Was reading in the help about the sky sampler setting but having added lights to my scene, sky sampling isnt an option.

Also considered rendering with camera animation for first 200 frames then rendering a 2nd pass switching to above settings for last 100 frames but I wasnt sure if the 2 passes would look similar enough once composited together, so I took my chances with full animation.

Just wondering that with this info someone could give their opinion of the setup and what they might do to optimise speed. Cant rally share the scene right now. So hopefully this info is enough.

Thanks for your time

jonahtobias
10-23-2009, 12:39 AM
Hi Joel, I'm no whiz at GI stuff but could you get rid of the other lights in the scene and add some bright spots to the sky map to approximate them? Then go back to Sky GI (which never looks as good as full GI, but does the job.)

Another possibility is to scrap GI entirely and use a light dome technique like Skylight -- http://www.digitalmedia.cz/plugins/skylight/ and some AO. Also won't look quite as good but will be 1000x faster!

JoelOtron
10-23-2009, 01:12 AM
Hey Jonah

Really appreciate the response.
Great suggestions--I had forgotten about skylight.

Some of the additional lights in the scene are cast from a building, like in the lobby entrance, (its a big hotel) so at this point Id have to rethink things.
Been rendering for 18 hours now (including 12 hours of prepass) and up to frame 100.

Once this render is done Im gonna need to optimize the workflow here somehow for the final.

Live and learn...

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10-23-2009, 01:12 AM
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