Landscape painting lag/delay

Development World Creation
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1

Hi,

I have a shader using landscape-blending to blend 7 materials using height-masks. The material also uses height-based tessellation. Lately when i paint on my landscape Unreal Engine freezes for 1-2 seconds when I release the “paint-button”. I have checked my computer performance during the lag-spikes and it does not seem to be a performance issue. No “performance spikes” when the error occurs. It would not be a problem except that I have to paint a very large landscape. Those seconds will add up. Does anyone have a solution?

Tried on a smaller square landscape and did not have this problem.

Thanks!

2

Updated to 4.7.4 today and the problem is gone!

3

I’m using 4.13 and the problem appeared. Any idea what is causing it?
Similarly, after painting or sculpting the terrain, UE lags for 1-2 second the moment i release my mouse.

4

the problem appeared to be back in 4.19.1! why does that happen?