Geo Nodes - Support for Instance Domain Attributes

[opstyix]

I've been playing around with Geometry Nodes and noticed that the "Instance Domain" attribute isn't directly accessible with Octane's shader nodes. Provided are two examples in the form of collections (Linear and Spherical) where they are used in the .blend file below.

In the screenshots, my intent is to have the instances turn white when they are to one side of the Empty, and the rest to be black. Notice how Octane doesn't produce the same output as in EEVEE.

I found adding a "Realize Instances" node to the end of the chain will produce a similar output when using Octane but that would not be feasible when working with a large number of (and more complex) instances.




Thanks!

[linograndiotoy]

Thanks for your detailed explanation and for the scene. We'll do our best to support this in Octane.

[opstyix]

Hi Lino,

Has there been any developments on this? I've been checking all the builds as they release and in hopes they would work. Would appreciate any updates!

If it provides any additional assistance I found that Octane has trouble reading from multiple Geometry Node attributes, regardless of the domain. It'll only read from the very first attribute in the node chain leaving the other attributes to default to white. Tested in 28.4 beta addon. I've attached a test scene based off the screenshot below.

[jan8]

I'd love to see more support for the all the attribute types blender has on offer. lack thereof actually turned me away from octane a little, as most of my work is currently done in geo nodes and its integration with cycles is hard to beat

[opstyix]

I'm in the same boat. Geo nodes has opened up a lot of room for creativity especially when it comes to animations and motion graphics, but without the full support of attributes from octane, it becomes incredibly frustrating to use. I hope this gets some support in the near future.

[linograndiotoy]

That's a very important feature for sure, but not trivial to implement. It's needed and we're working on it.

[AlexeyAdamitsky]

Geo nodes are becoming essential in my workflow, and I too need access to attributes data for a variety of effects. It's very frustrating not being able to get access to this data. I guess I have to use Cycles as others since I can't really do quite a lot because of the lack of attributes support.

[linograndiotoy]

Again, we're working on it.

[opstyix]

I appreciate the update Lino,

I noticed this panel while tinkering with Octane today. Not sure how long it's been here for but I'm going to assume this isn't fully implemented yet! Regardless I'm excited to see progress being made. Thanks again.

[opstyix]

Hi Lino,

I apologize for any annoyance this may cause but has there been any updates on this? I understand there are other features that'll take priority but any update is appreciated. Thank you!