black render window - means?

[sck5000]

Hi,

I've been trying the Octane demo for the last week or so and am pretty impressed. Everything seems to work really well, except -- I get a black render viewport it seems when I hit a certain GPU memory point.

Octane says 261/495 MB used, and I get a black viewport. When I go below around 255/495 MB used, everything is fine. The black viewport still allows me to color-pick and show materials in the node inspector, it just renders an entirely black view.

Should I be able to use all my GPU memory or just half?

I'm on an 9800 GT that is also my display card. All my drivers/cuda drivers are up to date.

thanks,
Steve

[radiance]

I think what's happening is that your OS is using the remaining memory.
Can you provide details, eg octane version, your operating system type and version and the drivers you have installed ?

Thnx,
Radiance

[sck5000]

CPU: Intel Core2 Quad Q9300 w/ 8 gigs ram.
OS: Windows Vista home premium edition 64-bit w/service pack 2.
GPU: Nvidia GeForce 9800 GT w 512mb, 112 cuda cores.
Octane: 1.022 Beta 2.2

GPU & CUDA drivers were updated when I downloaded Octane to try it out. The Nvidia control panel gives these now as:

Driver version: 197.13
CUDA 3.0.1 driver

I'm running display at 1920x1200 if that matters. Problem still exists where I get black screen after about half of GPU memory used. Can display possibly be using 250 mb?

thanks,
Steve

[enricocerica]

Yeah, I experimented the same issue several times, your scene exeeds the remaining memory, try to stop programs consuming video memory, for example your modelling application. You may also try to reduce the size of the image maps used in the scene.

[sck5000]

I don't have any image maps in the scene yet, I'm hitting this problem before I have even begun to texture. Does the licensed beta version of Octane manage video memory better than the demo? And I still don't really believe that my video card uses fully half of its memory just for the display?

Also, the .obj file is only 50 mb. Is it normal that a 50 mb file would take up 250 mb of gpu memory after Octane has processed?

Thanks.

[sck5000]

L'il help?

-s

[8Eggar8]

Maybe I'm wrong. But I believe I've seen this too.
and I think the initial camera position is dollied in infintesimally too close to an (the) object.

I'll go back to my parent app. and make sure the scene is where I need it nearest the 0,0,0 coordinate, set my camera the distance I want, and re-export it back out as an obj. and viola' it comes out o.k.

Maybe this is happening with your circumstance as well?

In my case I find that 'saving' preserves the scene positioning, while 'export'ing doesn't.