Light Cache/IM wont show up...

[Jason Matthews]

I am trying to render a 4200x2350 exterior image with light cache and iradiance map. The issue is no matter how I do it the light cache just stays black and the IM renders very odd and pixelated (bright pixels not native to IM). If I reduce the image size to say 2500 pixels then everything renders fine. I have bitmap pager on, dynamic memory set to 3000.

 

System: Dual Xeon Dual Core 1.6, 4 gig RAM.

 

3 gigs show up in the system properties.

 

I have tried not rendering final image and saving the LC and IM and still same result.

 

Thanks,

Edited May 29, 2008 by Saturn

[Logitek]

Hello Jason,

 

Are you sure the LC is rendering black? With big images, you sometimes have to zoom in the image to see the LC...

Try to do a render region and let it render completely. If it's ok, then render the whole image.

If you can render the image at 2500x.... it shouldn't be a problem to render at 4200x...

 

cheers,

[Jason Matthews]

I have checked it numerous times. It is in fact rendering black. Any suggestions?

[Logitek]

Weird! What does the Vray log say?

[Jason Matthews]

OK. I finally realized that I have run out of RAM. Apperently this is the less severe crash than getting errors. I ended up saving to a VRIMG file. Now I can't seem to convert the file to a exr file. I have opened the vrimg file by going to File/View Image File. My question is, how do you save out the seperate channels (shadow, reflection, etc.)?

[Christopher Nichols]

You need to use the vrimg2exr utility. It is a command line utility located typically in this location:

 

C:\Program Files\Chaos Group\V-Ray\3ds Max 2009 for x86\tools

 

if you just type vrimg2exr, you will get the full help

 

the tag you are looking for -channel which will separate out the channel that you are looking for.

 

Chris

[Jason Matthews]

I really hate being this ignorant but I have typed in the following in the dos prompt:

 

vrimg2exr C:\Documents and Settings\jmatthews\Desktop\Yves\Final Renders\Render1 files\FinalRendering.vrimg C:\Documents and Settings\jmatthews\Desktop\Yves\Final Renders\Render1 files\FinalRendering.exr -sRGB

 

And it gives me the error: Too many arguments ("Settings\jmatthews\Desktop\Yves\Final")

 

What the hell am I doing wrong???

[Jason Matthews]

OK. This is a little different than everything else I have found on the net both here and the vray forums. Below is a link that has a few links to some plugins/execution files that can be used to change vrimg files to exr files. It also has an exr plugin for photoshop.

 

http://www.asgvis.com/index.php?option=com_content&task=view&id=16&Itemid=57

 

Basically, you download the files: vrimg2exr plugin with GUI (not supported) and OpenEXR Photoshop plugin. Extract the OpenEXR Photoshop plugin to the plugins folder under your root photoshop directory. Then extract the GUI4vrimg2exr.exe file in the same directory as Chaos Group's vrimg2exr.exe. Then open it and choose the vrimg file you want to convert. Choose the channels that you have saved (only the channels you have chosen to render out will appear white, all others are grey). Now open all the files in photoshop.

 

I have also included the zip files for easy download in case the link expires.

 

Chris, do you want to make this thread a sticky???

[jon kon]

Hi everyone, im new and this is my first post.

 

I have a rather large file which i have had to save as a .vrimg. I have the above download for the converter, but i cant seem to get it to work.

 

I am running vray in sketchup, and im not even sure if it has vrimg2exr.exe!

 

Is there another way to convert to exr?

 

Thanks, Jon.

[jon kon]

ok, so now i have downloaded the asgvis, vrimg2exr.exe file, and i have no idea how to use it!

 

please can someone help, this is completely new territory for me!

 

the folder contains files called:-

 

libmmd.dll, msvcp70.dll, msvcr70.dll, and vrimg2exr.exe

 

when i click the .exe file, it flashes open as a black screen for a second, and then closes before i can do anything or see what it says.....