The TwoSidedSign material node is behaving differently for the exact same mesh imported with “Enable Nanite Support” on or off.
Nanite support disabled will properly show front-faces (green)
Nanite support enabled, will show back-faces (red)
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I would expect the node to have the same behavior regardless of Nanite support.
This is the simple material used for the example above and the repro project.
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Steps to Reproduce
Create a masked material that shows front or back faces of a mesh using the TwoSidedSign node.
Import the same mesh twice, once with “Enable Nanite Support”, once without.
Apply the masked material to both.
Notice how the faces shown are different for both meshes.
This wasn’t an issue in UE 5.3.2.
Sample provided showing the exact same setup in UE 5.3.2 where both Nanite enabled/disabled have the same behavior.
Hello,
Thank you for reaching out.
I’ve been assigned this issue, and we will be looking into this face normal issue for you.
Hello,
Thank you for reporting this. I can confirm this issue can be reproduced as described in the latest CL, and have opened a bug report:
The tracker will be visible after it is approved internally at Epic Games and is publicly accessible.
If you have any further questions, please let us know.