Hey this mod is very cool

Bug / suggestion to improve:

When I a player see a flat snow layer or tallgrass, and place a block, it Replaces that block. So i do not have to dig the snow layer and then place the block, it just overwrites the snow layer just like water.

Please add this feature to the capsules.

In a snow biome, such as here when my worldspawn was the top of a mountain

when i try to place the capsule it treats snow layers as solid instead of replaceable, and now my hut hovers above the snow, instead of replacing the snow layers

Hey ! The feature already exists and is called "overrideable", in early versions of capsule (<1.20) its configured in the capsule.cfg file, and in latest versions it uses the tag system.
=> https://github.com/Lythom/capsule/wiki#overridable-blocks
Let me know if you encounter any issue with the system!