Njordy Jovanovich

The image_formats [www.sidefx.com] still recommends .rat, but I'm not sure it it was maintained up to date.
It also recommends "icp program to convert between image formats" instead of iconvert...

- If I know what I will be using Karma exclusively, will there be any benefits in converting to .rat, since .rat was the native format for Mantra? I know in general they are pretty damn similar, but if we are talking about huge amount of data...

psanitra
...edit the string inside with python TOP, replacing .exr with .tx

- Do you maybe have a Python script or .hip file left from those times?
- Is this absolutely necessary to change these paths? I mean in times of ROP, the render engine usually tried to look at the same folder if see if there are same_name.tx or same_name.exr.tx file next to the original. It's more strict in USD rulz?

psanitra
Njordy, TOPs is great for that. File pattern to recursively find all .exr textures, then generic generator to run command line job for the conversion. I used maketx, but you can use imaketx or iconvert from the Houdini bin folder too. The last thing to do is to point the materials to new tx instead of exr by editing the usda files. Again you can do that with file pattern to load the files, and edit the string inside with python TOP, replacing .exr with .tx

I guess I finally need to learn some PDGs
Thanks for haring your workflow.