OTOY Forums

UDIM textures do not work in Blender plugin. They work in Standalone.
Here is the example file.

Please try this:

Right now that's the only method working in Octane for Blender. Let's see if we can make other name formats work as well. Current one is way too much complicated.

This is the file I modified so it can work in Blender right now (I had to rename the images properly).

Is this still not addressed a year later? Having to manually rename UDIM files just so that they work in Octane for Blender seems....how do I put this....una stronzata!

You should "put this" politely, Midphase. Which you definitely didn't.
Please try to be professional when asking for information about features or when you want to express a thought here.

Ok Lino, scusa. forse non avevo capito bene come funziona la cosa e probabilmente la spiegazione che hai dato non é molto chiara. Forse un tema per un tuo prossimo video?

Sorry Lino, apologies. Perhaps I didn't understand how it works and the explanation was a bit confusing.

I got it to work, and I'm posting the solution here for future frustrated users.

Basically there are several steps that need to be taken in order to get UDIMs to properly work in Octane for Blender:

1. Use the TextureTile node and not just the plain Texture node.

2. Replace the last 4 digits in the UDIM file name to "1%i". So for instance, let's say your file name is the following: SPACESHIP_BASECOLOR_1001.exr in order for Octane to recognize it you have to change it to SPACESHIP_BASECOLOR_1%i.exr (at least this is what is working for me)

3. Now you need to change the number or rows in the node Grid Size (X) and (Y) to 10 and 10 (the second number should be higher if you have more than 100 UDIM tiles to match your UDIM set.

4. Now you need to change the Start value in the Node parameter to 1 because UDIMs start at 1001

5. Double check that your Digits is set to 3 because Octane disregards the first digit so it's only looking at 001, 002, 003 etc.

That should do it, but boy is it more convoluted than it needs to be. It's little things like these that keeps Octane from being more widely adopted IMHO, because otherwise as a render engine it's excellent.

As I said, Lino please consider doing a tutorial on this as one of your next videos. UDIMs are an important part of many people's workflows and I think it's critical that OTOY does as much as possible to make it as clear as possible how to properly use them in Blender. Renaming the files manually like you did is not a solution unless we're talking about a very limited number of tiles.

In the meantime, I will point to this video that ultimately was what got me to the solution. All the other information available both on this forum and other places is either incorrect, outdated, or uses the unworkable renaming solution.

https://youtu.be/vnYznjQXd8E

No problem.

As you stated (and as also stated in one of my posts in this same thread) yes, the current UDIM workflow is not very user friendly (well, it's not user friendly at all ) and needs to be made way easier and immediate.

Before solving the issue, we needed to implement some important changes in the system. Those are finally in place.

We're working on the new UDIM workflow it right now, and it will be available in the very first release with Octane 2021 integrated.

And yes, the workflow showed in the video is actually the best way to do it right now.