Hey yall. I thought I should pose this question here because I can’t gather enough information to replicate what looks like an engine bug. I made a Material Function to significantly shrink down the amount of nodes I need in my landscape material. It handles randomizing texture inputs so the landscape won’t have such obvious repeating materials, and thanks to it I got my landscape in a state I’m really happy with.
Material Function Inside my Landscape Material
This is when the “bug” steps in.
Material Function Missing Nodes
I’ve noticed twice now that a bunch of nodes inside the Material Function disappear all on their own. All I had to do was close the window, and later when I opened the function up again, nodes were gone. The first time, I just stitched back the bit of work I lost. The second time, way more nodes went missing. There’s absolutely nothing in their place to click on. When I click the Stats page, there’s a bunch of errors because of course a bunch of connections are lost. I really don’t want to keep redoing this work.
Material Function Errors
I don’t see any consistency in the nodes that are vanishing either. I have Named Reroute Declaration nodes vanish, math nodes like Multiply vanish, Texture Sample nodes vanish, and Landscape Layer Blend nodes vanish. Just to check, I reloaded the project, and all the nodes are still missing. I’m working in UE 5.5.2.