Here's an idea for how inventories could be handled (it's just a rough example, so certain graphics are missing): -If you're carrying a build tool (top-left image), the brick inventory will appear above your items hotbar. This will allow you to choose a certain brick / build in one hand, while being able to wield / fire a gun in your other hand.
-If you're carrying a backpack or small container in one hand (top-right), you'll be able to access it (also while being able to wield / fire a gun in the other).
-The layout when viewing a storage brick's / vehicle's inventory (bottom images) would also be simplified, even while carrying a backpack / container in your hotbar.
-This would most likely work best when in a minigame or for default building. Although, a toggleable
free-build mode could be added as well, which when enabled, would allow players to build in a way similar to Lego Worlds or Roblox, and allow for free camera movement.
If you're not accessing an inventory of any kind, and not carrying a build tool, this would be the default appearance: