Since both mods are maintained by the same authors I'll put this feature request here.

Is your feature request related to a problem? Please describe.
MiniHUD has a various shape previews that we can use, but it's always bothering me that I can't build it layer-by-layer and there is no way to verify if I'm missing a block somewhere. It would be beneficial if I can convert those previews into a Litematica schematic.

Describe the solution you'd like
A button to import a schematic selection in Litematica (or to export a shape in MiniHUD) would be nice to have. And if player is holding a block Litematica could treat that block as a building block for this shape.

Describe alternatives you've considered
n/a

Additional context
n/a

You can show the shapes in MiniHUD layer by layer, there is a Render Layers setting in the shape configuration menu of each individual shape.

And also I think this is already somewhere on my todo list - the ability to generate simple shapes as schematics for Litematica.

Oh, ok, then I guess I need to update MiniHUD on my side to see layer-by-layer thing. This is actually a good feedback, thanks, I'll edit this part out my comment.

About the simple shapes in Litematica: I understand it's probably not a very demanded feature, so I just hope to see it in the future, maybe in Litematica for MC 1.18-1.19.

And when you integrate simple shapes into Litematica in the future, will you remove this feature from MiniHUD, so those 2 mods won't essentially do the same thing?

P.S.: Thanks for your mods, btw. I could not play MC without them.

The shape renderer will stay in MiniHUD, they don't really do the same thing exactly, and I think most people would prefer the MiniHUD despawn sphere or circle shapes as a simple building guide. As for when it will get added to Litematica, I think it will come via the main development version from 1.12.2 at some point after the big rewrites and code clean-up are finished. It won't be near the top of the todo list, so no idea when I'll have time to get to it.

I believe the render layer option existed ever since the shape renderer was first added. At least it has been there for a long time, it's not a recent addition.

And thanks! :)