Physics & Materials

Blueprint AI configures a project’s physics: custom collision channels and presets, the physics project settings, the physical-surface registry, and the physical material assets that index into it.

Note

Collision channels, profiles, surfaces, and physics settings are project configuration — edits persist to DefaultEngine.ini and rebuild the engine’s runtime lookups immediately. Physical materials are content assets in the Content Browser.

Collision channels & profiles

Add a collision object channel called Interactable defaulting to Block Add a collision trace channel called LineOfSight defaulting to Block Add a collision profile InteractableProp set to QueryAndPhysics, object type WorldDynamic, overlapping Interactable and blocking LineOfSight Describe the collision settings

Physics settings & surfaces

Set the default gravity Z to -1300 and enable substepping with 6 max substeps Register physical surfaces Flesh, Metal, and Wood Describe the physics settings

Physical materials

Create a Physical Material called PM_Ice in /Game/Physics Set its Friction to 0.05, Restitution to 0.1, and Density to 0.92 Set PM_Ice’s SurfaceType to Ice and tune its destruction Strength sub-struct Create a Chaos Physical Material called CPM_Rubber with high friction Create a Physical Material Mask called PMM_Terrain and assign its mask texture

Tip

A physical material’s SurfaceType indexes the registry above — register the surface first, then assign it by name.