Physics Tab

Use Physics to tune Rapier-backed object release and collisions. Controls:

• Enable physics runtime: turns the scene physics runtime on or off
• Reset below floor: recovers a released object to its pre-grab position if it fully falls through the Y=0 floor
• Gravity: Y-axis acceleration. Range -30 to 0, step 0.1
• Linear damping: slows object movement. Range 0 to 10, step 0.05
• Angular damping: slows object spin. Range 0 to 10, step 0.05
• Friction: controls surface grip. Range 0 to 2, step 0.05
• Bounce: controls restitution. Range 0 to 1, step 0.01
• Max release speed: caps hand-release velocity. Range 0 to 30, step 0.25

Value guide:

• Gravity uses Y direction: 0 means no fall, -9.8 is earth-like when 1 room unit = 1 meter, and more negative values fall faster
• Low Linear damping: objects keep sliding or falling; high values slow movement quickly
• Low Angular damping: objects keep spinning; high values slow spin quickly
• Low Friction: slippery contacts; high values grip more
• Low Bounce: little or no bounce; 1 is the bounciest setting
• Low Max release speed: gentle throws; high values allow faster throws

Good to know:

• Physics affects dynamic bodies
• Scene Hands Physics release opts a grabbed object into dynamic movement; other release modes stay in control even when the physics runtime is enabled
• Scene geometry body type is set in Geometry Tab
• Fixed rigid body collides but cannot be grabbed
• Dynamic rigid body can be grabbed, pushed, dropped, and collided with