Why are the Landscape Layers not Rendering?

Development World Creation
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1

I recently updated to 5.5.4 and just loaded the game world map. After taking an unusually long time to load, the map opened and the Landscape was black. After building all levels, the landscape turned white. In the Landscape > Paint menu, I see that the Landscape Layers are not rendering.

Why is this?

I remember something similar happening back in a 4.x build, but I probably abandoned it.

Additionally, the foliage transparency has turned black. And it’s not just the landscape layers. Other meshes (HISMS) are not rendering their materials properly.

readyForGDC_1
readyForGDC_11920×860 163 KB

readyForGDC_2
readyForGDC_21920×1214 326 KB

2

I close down, reopen, and now it’s green. And blue. And working.

Mostly working. Some mats are still white. I’m sure it will resolve itself somehow.