Using Tree mask as an Unreal Engine PCG mask

General
1

I’m having an issue with a tree mask exported from Gaea and used in Unreal Engine PCG.

I imported the mask into UE as a grayscale texture and I’m using it in PCG to spawn trees. The problem is that instead of spawning trees smoothly according to the mask, it spawns them in visible square/blocky patches, almost like the mask is being sampled in tiles or low-resolution chunks.

Has anyone had this problem before? Could it be caused by texture compression, mipmaps, texture resolution, PCG sampling settings, landscape UVs, or something in the Gaea export settings?

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2

It could easily be the wrong texture compression settings. It’s been a while since I used UE last, but I’d check and make sure it’s set to linear.

3

It’s a mipmap issue with the texture being loaded on the GPU. In the texture setting, there is a checkbox called “Available on CPU”. This should fix it