Using custom alembic attributes as a mask in UE 5.6 material.

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custom_attrib_v3
custom_attrib_v31920×905 110 KB

Hi guys!

I am trying to read a custom attribute from an alembic geometry cache inside of UE 5.6 to use it as a mask in a material.

I have read that UE does not support alembic attributes but I could save them as a custom uv channel, which I did. I created a uv2[ ] attribute and saved the attribute there. This is a vertex attribute.

Here is the attribute visualised in Houdini as well as the uv2[ ] listed in the Geometry Spreadsheet.

sxQOzpw
sxQOzpw3021×1873 1.07 MB

My attempt on reading this attribute is on the post screenshot.

What am I missing?

Many thanks in advance