If you want to stop player units or computer controlled units to walk into special areas for example map border, mountains, into objects you need "Block Bits". Some entities in BattleForge will block automatically like buildings.
EA Phenomic uses different special Block Bits.
Green Block Bit: Standard blocks every ground unit.
Orange Block Bit: Blocks only flying units.
Yellow Block Bit: Blocks ground and flying units.
Black Block Bit: Map Border block bit, blocks every unit and have an additional fade out fog into black.
Blue BLock Bit: Blocks player buildings in the game. If you paint an area with blue block bits, human players can't play any BattleForge building card at this area. The computer doesn't build buildings.
Purple Block Bit: Blocks the sightline of enemy units. If you separate two enemy units with purple block bits they will not attack each other, because they can't see each other. But physically they can reach another by walking.
Dark Green Block Bit: Is a visual and a ground blocker.
Brown Block Bit: Is a visual a ground and a flying blocker.
White Block Bit: Ignores each kind of automatically blocking.
To visualize the block bits you have to activate the "Render blocks" checkbox.
To paint block bits, choose one from the dropdown window, activate the "Paint" button and choose a brush form and size. Click into the work window and use the left mouse button (LMB) to create your first block bits in your map.
If you have large areas to block paint a border around the area and use the "Fill" button like in Photoshop.