increasing render speed

[Srek]

With OS X CINEMA can access the maximum of 4 GB.
You will only get a speed increase if OS X needed to use virtual memory (disk swapping) to give CINEMA enough memory for the task.
Cheers
Srek

[dann_stubbs]

hi im currently rendering a 431 frame sequence at 800x600 and after nearly 6 hours its only done 54 frames, this does not bode well

i am using cinema 4d r8 with a dual g5 1.8 and 1.25 gb ddr sdram

my question is - i heard that cinmea only knows how to access a max of 2gb of ram at any time - therefore if i upgrade from 1.25 to 2gb will i get any realy significant speed increases do you think?

since you have a G5 - you are on osx and C4D can access about 3.7GB of ram (according to srek from posts here - more then the XP limit of 1.7 or the /3GB limit of about 2.7 on XP unsupported)

you would (could) get a speed increase IF your per frame render is actually going over the physical ram availability you have and into the VM which is substantially slower.

look at your process viewer and see what C4D is using for actual memory - if it is less the the free physical ram available you are just hitting the processor limits.

also closing the open scene, using the render queue and closing other apps will allow more physical memory to be available for the running app (C4D)

dann

[mancabbage]

thanks for explaining that guys. Much appreciated :thumbsup:

[Uncle-Ox]

Hi

Now isn't that just the million dollar question you're asking...?

Unfortunately I've found the rule of thumb to be: "If it looks extremely cool, it will render longer". This is true for all situations except for a very limited number of scenarios. There are some shortcuts one can take to lower ones render times but a shortcut here might be a stumbling block over there. Ofcourse you get the pros who can put out amazing work without shocking render times but, I think, it takes a lot of time and trial and error to get to that level. (I, for one, am not nearly there yet)

Here are some things you can look at that I've found to dramatically increase render times:
1. Does your scene have some translucent or SSS objects in it?
2. Does you scene have a lot of transparencies in it?
3. Does you scene have a lot of shadow casting lights in it and whether it has or not, what types of shadows are they? (area shadows render visciously long and soft shadows longer than hard and soforth and soforth) Also check what kind of shadow fall-off you're using.
4. Does you scene have a lot of reflective objects in it and are those reflections blurry?
5. Are you using radiosity?
6. Are you using layered shaders with alpha maps?
7. Do you have a lot of objects in your scene that has a lot of sharp pointy edges close to each other (like eye lashes)?
8. How high are your poly-counts?

I can go on like that for a while but everything you add the scene that gives you that extra bit of realism will increase your render time.

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