3D Shape taking forever to render

hello all,

 

i have simple composition animates 2 shapes using "screen" show photos.  shapes 3d; camera movement minimal.  have ambient light , 2 spot lights. 

 

i on 1 year old i7 processor 16 gb of ram.  cache files written ssd. 

 

still taking long time render (it's 3 minute project , takes 20+ hours render), , there's no pics added - "screen".

 

the final project similar many templates can find show photos/videos.   it's fancy slideshow, unlike can buy, hold 25 30 pics. 

 

any thoughts on can either use other 3d shape (but still keep 3d) or change parameters or workflow cut down render time. . .  pre-rendering composition (which take 20+ hours) obviously, if want change movement or overall length, means day of rendering. 

 

thanks in advance,

if using ray-traced 3d renderer , not using gpu provides acceleration feature, rendering slow:

http://blogs.adobe.com/aftereffects/2012/05/gpu-cuda-opengl-features-in-after-effects-cs6. html

 

in general, recommend using cinema 4d integration after effects on trying use rather limited ray-traced 3d renderer within after effects:

http://blogs.adobe.com/aftereffects/2013/04/details-of-cinema-4d-integration-with-after-ef fects.html

 

by way, 20 hours not long time 3-minute composition. people work in 3d (in 3d program, not after effects) have renders take weekend 30 seconds. 3d computationally expensive.

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