VRAM VRAM VRAM

[Kerem]

I have brought this up before but i have no answers still. I work as a stillframe artist and all the 3d stuff i do, the client wants them 50x70 and 300 DPI which is a pain in the ass.

Instead all i can do is 30cm high with 250 DPI and this is only the raw render which i can not do any crap with.

So i have told about the here and i was told the vram is limited by my gpu ( which is a gtx 780 - 3gb) So i said if i get a 2nd card would it solve my problems?

The answer was "maybe"...

I will eventually get a second card because the c4d itsself needs gpu to show you your polygons and etc. But

1) should it be a 3gb higher? like titan?
2) i know that if you have a higher card the psi system will be dependant on the lower speeded card... meaning yo shoul always double with the same card.
3) this may be a out-of-subject question I NEED MY LIGHTS SEPERATE like vray and maxwell. Now, i know you guys are working really hard... so just tell me if i need to learn how to use the standalone, or upgrade to 2.20 (which i think is not ready as it say "candidate" ) or what ))

thank you for your time. Anybody please answer, i have a project due monday and i can get my passes rendered in 16bit 300dpi...

[shawnfrueh]

DPI is not a resolution. 50x70(I'm guessing inches?) at 300DPI is a resolution of 15000x21000. You will have to split up your render into parts using math and the camera Lens Shift in order to render something that big. The max I can do on a 4x Titan setup is 17000x17000px or a total of 289mil pixels allowing only 700mb for textures and obj's Otherwise the pixel count will have to be dropped down. Even Though there are 4x Titans only 6GB of VRAM is available. If you use two different cards the amount of available VRAM is that of the smallest card. If you do a lot of these large renders I would invest in a 12GB Quadro card.

[Kerem]

would you have any techniqal avdices about split rendering.

[atome451]

There is a usefull script in the mediatheque of Cinema 4D : "tiled camera" or something like that. Very easy to use.

[aoktar]

is it inch or cm? you can divide height of render and slide camera by offset y. Render it as two parts and combine.

[Kerem]

İt is CM not inches

İ have found that tiled cam works and they have made a script in photoshop to actually stich them together, even the multi passes.

So my last question, can i render each pass in its' own file, not like a single psd file. Because that script is expecting single frame in each file. None of this is put to test by me, so the creativecow says...

[aoktar]

yes, you should unselect "Multilayer file". Also each render pass will consume VRAM as main buffer.