UDIM issues

[bencowell]

Hi,

Through my own stupidity I've wasted about an hour trying to get the various multi tile tags to work in the vray HDRI loader. After driving myself mad I read the help more carefully (yes I know) and noticed that uppercase and lowercase have different meanings. But once I'd input the path I couldn't swap the case. Max seems to cache the file path in lowercase and no matter how I try and change it, via the interface or maxscript I'm not able.

Has anyone else encountered this and is there a workaround ?

I realise that remembering to do it right the first time would be a good idea .. but I've found that once I've input that path incorrectly max remembers it with <udim> and even entering a new one into a new HDRI node defaults to lowercase.

cheers
ben

[vlado]

That's odd; which Max version? Have you tried restarting 3ds Max?

Best regards,
Vlado

[bencowell]

Yep I've restarted a number of times and recreated the issue in a clean scene as I thought I was going mad .. I'm in 2014.

[vlado]

Can you tell me how to reproduce it?

Best regards,
Vlado

[bencowell]

Sure. Here's my steps:

Have a couple of jpgs in a folder with the name_1001, name_1002 style UDIM tags
Create a VrayHDRI loader.
In the filename point it at a map. I usually grab the first file to set the path as you can't enter the <UDIM> tag in the open file dialog.
(so in this case it's : "C:\Users\Ben\Desktop\UDIMs\diffuse_forceCase_1001 .jpg")
Go to the file name and change the 1001 to be <udim>
The preview will turn black as no files are found as lower case <udim> seems to want to start at 0000
Try and change the tag to be uppercase but max will set it back to lower.

I did manage to get it to change with Maxscript, I'd struggled earlier but this time it worked:

myMap = sme.GetMtlInParamEditor()
myMap.HDRIMapName = "C:\Users\Ben\Desktop\UDIMs\diffuse_forceCase_<UDI M>.jpg"

**EDIT : I notice that the script doesn't work to change it back to lowercase .. so I'm guessing that once max has found a file and set the path. It's cached it perhaps and so I'm not able to change it ?. This is pure guess work on my part.