VRAM issue importing large tiled world

Development Platform & Builds XR Development
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1

I am trying to import a large tiled world from World Machine, 900 tiles total with accompanying weight maps, 505px tile size for a total of 15k x 15k. 256 sq km. This is on a 2080 Ti with 11 gb.

I got this to work once last week, but now I made major changes and need to reimport, and its giving me VRAM issues and a crash. To begin with, it’s using 4.5 to 5gb on an empty level which seems odd to me; then it’s filling up all the way to 11gb when trying to import the tiles and crashing, telling me its out of video memory trying to allocate a rendering resource.

Can someone sanity check me here? Should this be do-able or am I asking the impossible? If it should be possible, any suggestions for what I might try?

2

I moved the project to the main branch to see if I got any different results, and the same issue happened. I then tried importing without Edit Layers enabled, and it worked fine.

When I tried to enable edit layers to get the Water Ocean Actor to recognise the shoreline for attenuation, it flipped out. So something is going on there, and maybe this will help anyone else having this issue.

Would be nice if Epic can get the Water stuff to play nicely with World Partition maps going forward though.