PLEASE HELP

[Shopper2]

Hi Guys,

Im having troubles rendering a large image in Vray. 7000 x 7000 or anything above 6000 actually.

This is what happens when i hit render:

http://img206.imageshack.us/img206/2221/34769756vy8.jpg

If i also select light cache it just stays black and then when the irradience map starts it goes all funny like the attahced image.

Anyhow, i have also tried the tutorial on large renderings on this site by using the Render to VImage etc. However i get the same result when i do the large resolution section.

I dont understand what goes wrong, seeing that my machine is pretty powerfull. When i go down to 6000 by 4000 it works again. I need to do larger ones once in a while.

I just downloaded the latest Beta to see if i could fix the problem, but it still remains. I have also moved rhino / vray to my D drive (120 GB) to see if it needed more space...but also no change.

The materials used are mainly blurry metals

Below are my settings for the lights(u can see the scene here too) and for the scene itself (i use one HDRI map for reflections):

http://img177.imageshack.us/img177/8328/settingsfd9.jpg
http://img214.imageshack.us/img214/2...ettingspf4.jpg


My system prefs are as follows:

Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Precision M6300
BIOS: Phoenix ROM BIOS PLUS Version 1.10 A03
Processor: Intel(R) Core(TM)2 Duo CPU T7800 @ 2.60GHz (2 CPUs)
Memory: 3582MB RAM
Page File: 2915MB used, 2548MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)
DX Setup Parameters: Not found
DxDiag Version: 5.03.2600.2180 32bit Unicode

Card name: NVIDIA Quadro FX 1600M
Manufacturer: NVIDIA
Chip type: Quadro FX 1600M
DAC type: Integrated RAMDAC
Device Key: Enum\PCI\VEN_10DE&DEV_040D&SUBSYS_019B1028&REV_A1
Display Memory: 512.0 MB
Current Mode: 1680 x 1050 (32 bit) (60Hz)
Monitor: Default Monitor
Monitor Max Res:
Driver Name: nv4_disp.dll
Driver Version: 6.14.0011.5619 (English)
DDI Version: 9 (or higher)


Any ideas guys what is happening.

Also just a quick question:

Should "ignore light normals" be on or off under a rectangular light

Thanks guys


Justin

[dalomar_cg]

Re: PLEASE HELP

AFAIK that is just V-rays way of conserving memory. If you're rendering to vrimage then that will help as well. Also, turning off Show Calculation Phase for LC and IR will help too. Its not the nicest way for vray to tell you that it needs to cut back on something to conserve memory, but the desire is the end result...not the feedback on the way.

I would run a quick test at a resolution where you get that feedback. If the file is fine, then go ahead with the final render (it should be fine, but thats a good check).

Lastly, VRimg is really a must for render this big. That amount of data alone is atleast 100mb if not more, so it really does conserve memory

[dalomar_cg]

Re: PLEASE HELP

Just did a test @ 8000x6000...

the regular render process got the same visual artifacts, but the render ran out of memory and crashed before it had a chance to complete.

Changing over to vrimage got visual feedback (standard feedback for using vrimg) and the resulting render came out fine after processing with vrimg2exr.

The first run crashed right at 2gb mem usage (32bit system process limit), but the second run with the vrimage didn't climb above a gig until 2/3 through the render and finished at about 1.3

As I said before, these files are huge. The exr is about 1gb and my memory usage with the image in PS is about 1.3 gbs. Its giving ps a bit of a work out, and I'm not doing much with so don't take these images lightly and save memory where you can.

[Micha_cg]

Re: PLEASE HELP

Look at my sticky Render tool thread, there are some methods/buttons to get complex files / large images rendered. Very efficent is the button, that load an empty scene during Vray starts rendering, so that the rhino.exe is most used for rendering only.

http://asgvis.com/index.php?option=c...0&topic=2013.0

For better RAM usage use XP64 best.

[Shopper2]

Re: PLEASE HELP

Is vray memory or graphics card dependant or both?

Like i said above, vray cant render an image on my (dual core 2.6Ghz, 512MB Quadro FX with 4Gb Ram) at 7000 X 7000.

However it runs fine at 8000 x 8000 on a dell XPS with dual core 2.4 GHZ but has DUAL SLI cards at 512MB each...


So do we need better graphics cards.

Just curious


Justin

[dalomar_cg]

Re: PLEASE HELP

The graphics card is only used for viewport feed back and framebuffer feed back. Eventhough the frame buffer uses the graphics card, the typical systems (processor/memory) are still expended to tell the graphics card what to do.

Again, if you can't render the image regularly (which at this size should be expected), then you should render to VRImage.

[Micha_cg]

Re: PLEASE HELP

Justin, what is with you RAM usage? Try to use less RAM (my render tools / meshing of detailed complex models and delete NURBS geometry / lower mesh settings) and make available max possible RAM (64bit OS and >5GB RAM) for Rhino.