Error writng EXR file

V-Ray V-Ray for 3ds Max Issues
1

I m trying to explore the possibilities with the exr file, my first attempt I get an error: Error writing render region to raw image file. [ExrFile:: WTRegion] Error writing tile to .exr file.

What am I missing?

Best regards

2

Are you writing to a network location?

Best regards,
Vlado

3

Yes! indeed

4

You could try writing to the local disk instead; there is this issue with the OpenEXR library that we have not been able to solve.

Best regards,
Vlado

5

Oh I see, its a problem as I render pretty much everything on our render farm through BB, does it work in distibuted mode? Because for this one I render my high res localy with the distibuted but I save it on the network, so it would work if I had saved it localy?

Best regards

6

Might be worth using .vrimg instead? You’ve to convert them afterwards but when I was having network issues with exr files, vrimg bits were totally bullet proof.

7

Ok Ill give it a try, but how do you convert them to exr after?

8

With the vrimg2exr tool that comes with the V-Ray installation.

Best regards,
Vlado

9

Ha ok sweet, thanks for the info!

Best regards

10

Vlado,
I had a thought about the vrimg2exr tool. Is it possible to add a “folder watch” function where if the tool was open and running it could watch a folder and convert vrimgs to exr as they were added to a specified folder?

11

Heya Chris, it’s not quite the same thing but I’ve written a maxscript which’ll at least make you a bat file to convert a folder of vrimg’s:


local theFileList = #()
	local TheVrimgPath
	local TheVrimg2exrpath
	Local OutFile

	rollout ConvertVRimgBatFile "VRimgBat_0_05: Make a bat file to convert vrimg to exr files"
	(
		button ImageFileFolder "Rendered file folder" width:300 Align:#right

		on ImageFileFolder pressed do
		(
			TheVrimgPath = getOpenFileName types:"Vrimg(*.vrimg)" caption:"Pick the folder with your renders"
			ImageFileFolder.text = getFilenamePath TheVrimgPath
			theFileList = (getFiles ((getFilenamePath TheVrimgPath) + "*.vrimg"))
			print ("the files are " + theFileList as string)
			print ("There are " + (theFileList.count as string) + " vrimg files in the folder")

			if theFileList.count != 0 then
			(
				MyOutFile = "c:\\convert_vrimg_files.bat"
				TheBatFile = CreateFile MyOutFile
				for i in 1 to theFileList.count do
				(

                                       -- EDIT THIS LINE SO THE PATH TO YOUR VRIMG2EXR IS CORRECT

					format ("\"" + "C:\\Program Files\\Chaos Group\\V-Ray\\3dsmax 2012 for x64\\tools\\vrimg2exr.exe" + "\"" + " " + "\"" + theFileList[i] as string + "\"" + " -compression zips -datawindow -bufsize 500" + "\n") to:TheBatfile
					format ("\n") to:TheBatFile
				)

				Close TheBatFile
				ShellLaunch (MyOutFile as string) ""

				messagebox "Your bat file has been created at c:\convert_vrimg_files.bat - Happy now Vadim?"	
			) else (
					messagebox "There are no vrimg files in that folder"	
			)
		)
	)

	CreateDialog ConvertVRimgBatFile width:450

There’s one line marked there that you’ve to edit to suit your vrimg2exr location - at the minute it’s set for a default vray 2 for max 2012 64 installation. It’ll make a bat file in the root of your C drive which’ll run through all the files and convert them one by one. We used it when we were having exr problems on the network a while back - admittedly on hd res frames with 30 elements there’s a bit of overhead but it’s better to have a little bit of a wait but have files that are really solid!

12

Just to let you know, after a couples of test that it seems that the exr file is working fine over the network if you untick Render to memory frame buffer! :wink:

Best regards