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I am trying to accomplish something like the bottom picture but when I add either a rectangle or a polygon and lift it a bit (terraforming) I get this horrible triangular spikes (top picture). Does anyone know how can it do this? Am I doing something wrong?
None of the terraforming tools work properly with areas and elevations that small or narrow, or I haven't found a way yet.
It does seem possible for the sim's own terrain but that must be a different system we can't access.
The only way of doing it with any precision will be a 3d model.
Try create rectangle with 256x256 map, then terraform. The result is certainly not predictable, but in some cases it allows you to achieve a result. Or make a DEM mesh. Perhaps this will give the best result.
You May want to consider my answer in this 3d
The current mesh system Is limited by the resolution of the grid underneath It , you can take see It by enabling the wireframe settings in the Dev menu. Basically, the grid Is aligned north-south, so any terraforming aligned to the girld Will give you straight edges, any rotation Will give you a some jagged edges
You can't avoid It, it Is the way . You can minimize the effect by adding some falloff (aka smoothing) . Or you Can Hope in a higher definition grid, eventually they Will manage to obtain that, dunno It Is mesh related.
As per @superspud answer, if you Need a perfect shape, go for the 3d solution, you can borrow the sat imagery for your textures and plant some "fake" grass, most users Will not notice it
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