proportional editing falloff options to ensure a smooth transition across topology that's different to the falloff shape.
Proportional editing is currently limited to a round falloff, which means it's not possible to smoothly proportional edit areas surrounding the selection if the topology isn't also circular.
Ideally there should be three additional options which define the falloff shape:
- falloff shape from selection. This means if a loop is selected, that will be the falloff shape that affects surrounding geometry. Could still result in faces becoming skewed if surrounding loops don't have the same shape. There could be an additional tolerance slider (ctrl mousewheel) which limits the distance of falloff if the toplogy of surrounding edge loops become too differently shaped than the selection.
- edge count - falloff area expands perpendicularly outwards from the selection one edge at a time so that each surrounding loop has it's position modified as a whole to avoid faces becoming skewed.
- falloff from annotation/curve/greasepencil - user draws a shape onto the surface of the shape to define the falloff shape.
For option 1, 3, and the existing falloff shapes, there could be a reshape option, which will modify the shape of the surrounding edge loops so that they conform to the selected falloff shape based on the direction of movement (viewed from the opposite side) or averaged normal of selection/drawn shape when rotating/scaling, preventing face skewing.
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in modo there's a user-controllable feature called "falloffs" that essentially gives you infinite control over things like this. It's essentially a top-level tool just like the 3d cursor is in Blender. Unfortunately, if you've never used Modo before it's kind of a hard concept to explain and understand the value of but once you've used it and then switch to Blender it's like losing an arm- you will always miss it. youtube.com/watch