Thanks for the new scene file.
It turns out you are using the wrong tile node in 2026.5.0.0. In 2026.2.0.0, you are using "UV tiles" node, but in 2025.0.0, you are using "Tile grid image" node which doesn't have Border mode (u)/(v) parameters.
Houdini plugin renamed and reordered vop nodes ...

Thank you for reporting the problem.
I've reproduced the crash issue and will be fixed in the next release.

As to the render result, I'm not 100% sure about the expected result. I noticed the Border mode (U) / (V) is using "White color", if you change them to "Wrap around", you will see ...

I can't get UDIMs to load correctly in the "Tile_grid_image' rework.

I've setup this basic example scene, with simple test geometry that has four UDIM tiles (1001-1004).

The model has been exported to Substance Painter, where a corresponding BaseColor sequence has been generated.

I've tried ...

I can't get UDIMs to load correctly in the "Tile_grid_image' rework.

I've setup this basic example scene, with simple test geometry that has four UDIM tiles (1001-1004).

The model has been exported to Substance Painter, where a corresponding BaseColor sequence has been generated.

I've tried both ...

Hello!

(I originally posted this in the 2025.3.0 release thread, but reposting here for appropriate categorization.)

I'm seeing a strange performance issue that I suspect is related to the new IPR QT5 overhaul.

I've been able to replicate this issue consistently across different scenes, both ...

Hello!

I'm seeing a strange performance issue that I suspect is related to the new IPR QT5 overhaul.

I've been able to replicate this issue consistently across different scenes, both complex and extremely simple. After the IPR image posts, zooming in/out and panning around the IPR eventually leads ...

Very excited to try out the new Realistic Lens models - however, I've noticed some serious limitations:

1) IPR UI controls (ie Pick Focus, Disable DOF) don't work with Realistic Lens enabled.

2) With Realistic Lens enabled, you can't zoom/pan the IPR camera. (Which is extremely important for look ...

Following up here to see if there are any potential updates!
The lack of proper navigation controls (ie panning, zoom) as well as an integrated A/B Compare for the Qt5 IPR is incredibly disruptive to artist workflows.

I've been working on a large scene and have constantly battled the VRAM-limit/black frame output.

While attempting a pass at optimizations, I discovered the Octane Texture Manager provides estimates of VRAM Allocation per texture file, as well as some additional information that C4D's native ...

Hey Beppe!

I've been working on a script for Cinema4D that generates a shader ball rig for easy look development.
It allows for different shader ball models and materials to be loaded, and currently I'm including the Octane Material Ball as 1 of 3 options. It's really not much, but I'm hoping to ...