MtlX Standard Surface/OpenPBR Surface have a pin for displacement in Standalone but that is not the case in Houdini so there is no way to use displacement.
Screenshot 2026-01-08 122323.png


I've noticed it while testing Solaris but since this is also an issue in main plugin, might just report it ...

None of the MaterialX nodes work with Octane materials.


Screenshot 2026-01-08 031532.png


Hi Galleon,

It seems we support the USD MaterialX builder straight away!!
Could you please give it a go and let us know while we're investigating?

Cheers


I tested that and it works fine. They ...

None of the MaterialX nodes work with Octane materials.

Why are particles still rendering as instanced sphere meshes and not as sphere particles?

You should be able to render millions of particles and be able to scrub through the timeline but not in Solaris... I've attached videos showing the difference between main plugin and solaris.

Getting this bug when rendering leaves from megascans. I've attached a sample file. It should show the bug when you render. To fix it, go to /obj context > leaves_import and enable attribute delete.

Octane Error: Trying to set array in attribute of wrong type
Octane Error: Trying to set array in ...

MtlX Facing Ratio - *** OCTANE API ERROR: No matching configuration found
MtlX Geometry Color - *** OCTANE API ERROR: Can't read string from static pin 'unknown' (P_UNKNOWN, type PT_UNKNOWN) of node '' (NT_UNKNOWN, 00007FFC71E26520)


Will look into this! Thanks!
For the geometry color, did ...

MtlX Facing Ratio - *** OCTANE API ERROR: No matching configuration found
MtlX Geometry Color - *** OCTANE API ERROR: Can't read string from static pin 'unknown' (P_UNKNOWN, type PT_UNKNOWN) of node '' (NT_UNKNOWN, 00007FFC71E26520)

This is a core bug: Using displacement messes with the UVs so you cant use the same input for other maps(base color, rougness, etc.)

Left is with displacement only, right is with displacement and base color.

Output type for RGB Image is missing.
Distorted UVW projection node is missing.

Tiled render is bugged. Its rendering the tiles in the wrong positions.