Describe the solution you'd like
A brush that places down snow layers. If there already is a snow layer, it should add to that.

It should only try to place snow layers on (full, solid?) blocks with a block below it,

Parameters

Brush size: The size of the affected area

1st image:
so it would place snow like this. It would "see" (sorry... not that smart with how plugins work...) that there is a 7 block gap in the rear one, so it would place a 7 high snow, then a 6 high, etc etc to be smooth. Or the middle one, it would see its only 6 and skip a level to compensate. And so on so forth. It would leave 1 block at the end to be a snow block to improve the smoothness.

2nd img/3rd:
I think it would also be important for it to see that if there are two blocks across from each other it would do something like the second image and not like the img.

No idea if this makes sense
Image

idk if its possible but my suggestion is that within the brush size it will try to go from something like this in the 1st img to one click to the second image

and i made it simple to show but I think it would be really cool if it could figure it out itself on how it would work so you could use it on a gentle slope for example and it would be able to sort it out to be smooth


I think it would also have to see what snow is already place down so if you were running the brush along a slope it wouldn't conflict with the last time the brush was used if they overlapped if that makes sense?