OTOY Forums

Hello.

Ill try to keep this short.

Specs:
Windows 7
Cinema R16 + Octane latest 2.25
GTX 960 2gb VRAM
32gb System RAM
everything works fine...

This scene is a spline ball, millions of splines that have been extruded 0.1%. No textures, no lights, no nothing...just the mesh.

My Cinema project information window says my scene, just the mesh, no textures are implemented yet: 650 mb +/-
The mesh will render in the live viewer, live viewer is scaled down to about 1/4 th of 1080p screen. In the live viewer it says I have 1.56 gb in the GPU RAM. When I go to render a 1080p in the picture viewer, then the error log says the GPU ran out of memory.

Question 1: Where does the extra scene data come from, more then doubling the scene? (projekt info 650mb / live viewer 1.56gb)

Question 2: Ofcourse overall rendering takes more time at a higher res, but does Octane create as well more geometry, therefore I cant render in the live viewer because the GPU gets full?


Thank you for all your help and info.
Ron

correction: last sentence "cant render in the Picture Viewer because..."

So I will expand on my tests and what I have learned so far.

First of all it was unfair of me to compare the Cinema built in project information memory with the Octane memory. They compute totally differently. so disregard.

So it seems judging a scene whether it fits into my 2gb GPU VRAM, is trial and error, fine with me. As long as I know. Waiting for 1080 anyways, erasing this problem.

One big thing I did notice, I could not get the picture viewer to load the geometry, but after a tip from a friend, starting a the scene without doing a live viewer preview then I was able to get a picture viewer render. It seems the live viewer (buffers?) or (doesn't empty completely?) and therefore takes a bit of space up.

My scene is 1.87 gb, just barely fits into 2gb VRAM. So that extra space is much needed.

The only way I have found to render it is live viewer previews, making sure everything is correct, save and close, reopen and render direct to picture viewer. Then it works.

Anyways, here is a screen: Industrial Felt
Small thin box filled with traced particles under high turbulence, trails converted into splines and then extruded 0.1%. converted again and then duplicated 3 times and layered in different colours. Need this high poly because of extreme close ups needed.
http://imgur.com/F9g3Nkh

Have a great day rendering, and thank you Otoy for all you have done for the community.

Hi themotionist,
I have not checked directly your scene, but unfortunately the free VRAM is very limited on your system, and Out-of-core is not an option here, but this is a case where v3 could be the solution
Please, could you try with v3 by reducing the Parallel samples to 1 in the kernel settings to reduce the VRAM request at minimum? Since in v3, the film buffer is no more in VRAM, you should have a bit more free VRAM without the 1080 frame buffer.
ciao beppe

Hey beppe,

Thank you for your reply and you are right, V3 would help this out alot.
Awesome tipp about the Parallel samples as well.

I will update when Im in V3.

Greetings
tm