Flatten tool not respecting flatten mode

Bug Reports Studio Bugs
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#1

I have noticed that the Flatten tool does not exactly respect the selected flatten mode.

The first mode (remove terrain higher than the starting plane) will raise terrain that is slightly below the starting plane. (It may rarely also disregard the plane altogether and start eroding terrain lower than the flatten plane as if I was using the erode tool)

The second mode (raise terrain lower than the starting plane to be level with the starting plane) will erode terrain slightly higher than the starting plane.

Expected behavior

The first flatten mode (erode higher terrain to be level with starting plane) should not affect any terrain that is any amount lower than the starting plane.

The second flatten mode (raise lower terrain to be level with the starting plane) should not affect any terrain that is any amount higher than the starting plane.

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#2

Try using the block/cylinder brush instead. The falloff of the spherical brush probably causes the flattening algorithm to struggle because of the 4x4x4 voxel grid already limiting things.

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#3

With the other brushes, this problem is just more amplified, especially with the first flatten mode.

#4

I caught an instance of it seriously disregarding the selected flatten mode here.

It shouldn’t be doing anything to the terrain that’s higher than where I started, it should only be filling in terrain that’s lower than where I started.

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#5

I am experiencing exact same issues, kinda sucks.

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#6

hopefully theres a patch for this soon, https://gyazo.com/b2ae60a54b0be4fadc001cb754b8ef73