Quote - BTW, this scene (link) takes over 8 GB in RAM, as seen by the Task Manager. So I would need at least 2 of the toys you mentioned to handle it.

 

Well, that's 8 gigs in Carrara.  Exporting that scene through a translator to Octane might optimize things a bit.  Do we know for sure that Carrara's management of scene assets is as efficient as it could be?  Looks like some geometry in that scene could be instanced to save mem if you really wanted to, but all in all, you'd also get a higher quality of render than you have there, in less time.  I'm not knocking your render quality, it's a nice work, but there's a lot of occlusion shadows and atmosphere missing there, which I'm assuming was done to speed up render time.  Also, if you exported that geometry as an OBJ, is the size of the OBJ 8gigs?  Couldn't you reduce bitmap size to help memory too?

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Tools :  3dsmax 2015, Daz Studio 4.6, PoserPro 2012, Blender v2.74

System: Pentium QuadCore i7, under Win 8, GeForce GTX 780 / 2GB GPU.