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RealReality
07-25-2008, 11:47 AM
Hi,

I'm learning V-Ray since a year now, and when rendering a little bigger and harder scenes, the program starts to fail...

I hope to find some answers here, I might do something wrong, selecting too high quality while unnecessary.

I'm using V-Ray for Rhino 4, with all V-Ray lights and materials, NURBS modelled scenes... (no meshes)
This is the hardware I'm using:
* C2Q Q6600 2.4ghz
* 4gb DDR2
* 500gb HD
* NVidia Geforce 8800gts 320mb

OS: Vista Home Premium 64bit

___________________

Now the problems:
I'm currently trying to render a realistic ocean, with a sailyacht in it... The latter would'nt be a problem, not too many details so far, but the ocean is really destroying my computer :p

Preparing the Light Cache goes up to 3.2gb RAM usage, with Subdivs set at about 600,
when I set the Subdivs to 1000 (default value), it causes my computer to crash, as memory usage raises significantly. :argh:

Now, I got past the Light Cache, and through the Irradiance Map rendering, for an image about the size of 640x480. I saved both maps on my harddisk, and use them to render a larger image, 1600x1200 (also tried 1024x768)
Not even half way the rendering process, the memory usage has raised to 3gb, and a bit further, it crashes...

Instead of describing all options, I'll upload some images with the settings and scene.


Thanks for your help ;)
mister3d
07-25-2008, 01:29 PM
Maybe you could use proxy for heavy models. If your scene consumes too much ram, you can try to switch to dynamic memory and raise its limit, maybe to 1-2 gb. Render to wrimg file. Don't use lightcache, use gmc instead, lightcache is memory eater. DIsable built-in framebuffer, set the resolution manually, because it doubles the buffer(max+vray).
RealReality
07-26-2008, 02:19 PM
I'm using Vray for Rhino,

so proxies aren't available (at least, I wouldn't know where to find them?),
dynamic memory isn't available either
resolution is set manually in the vray options, output

I have an IR map, and LC map rendered already, put them in the slots, and then raised the resolution to 1024x768, output to VR Image. Memory rised up to 3.4gb (approx), and Rhino crashed suddenly...

I'll try to render the scene without Light Cache, but I doubt it will make a difference.

Images with settings are on their way.

edit: would Distributed Rendering help solving this memory issue?
I have two Pentium 4 computers in my network
RealReality
07-26-2008, 10:45 PM
I've thrown out all the textures I made, and made a fresh start using procedural displacement and bumpmapping,
no refraction anymore...

Now I've got the most realistic results I could've got so far :)
Render times have decreased a lot, and no more memory failure, it hardly uses any :p
I'll try to upload some results tomorrow.

edit:
the images:

http://img165.imageshack.us/img165/6900/procedural05copyip5.th.jpg (http://img165.imageshack.us/my.php?image=procedural05copyip5.jpg)
(click for full size) (http://img165.imageshack.us/my.php?image=procedural05copyip5.jpg)

http://img370.imageshack.us/img370/3462/procedural06copyiy3.th.jpg
(click for full size) (http://img370.imageshack.us/my.php?image=procedural06copyiy3.jpg)

The sailyacht is a friend's model, and materials aren't set up properly yet :x
Color correction done in Photoshop
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07-26-2008, 10:45 PM
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