Global Mapper Pro

Terrain painting fill gaps behavior

Hello,

I observed an unexpected behavior when filling gaps with terrain painting tool.

The original terrain was as in the picture below (this is just an example):

I opened a hole in it with "set to no data" and it became as below:

Then, I tried filling it again with "fill gaps" and was expecting it to connect the borders of the hole with straight mesh but instead it became as below:

It looks like it continued straight from the borders of the hole aiming at the center but keeping the same elevation as the points on border and so created a big "step" like terrain.

Please advice on how this works and what rules it uses.

Best regards

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