Hi, In order to avoid collision when simulating, there are 4 ways you can try: 1. Go to MD Behavior Data Settings > Properties > Time Horizon. Increasing the Time Horizon will make all the simulated actors take action to avoid earlier than the default setting. 2. Select your main character (Kevin), and go to MD Controls > Character Settings > Agent Radius. Increase the value of it, it will create a larger invisible collision volume to further decrease the chance of collision. 3. Go to MD Controls > General Settings > Root Motion Override. If you increase this value, when the character is about to collide with another one, it will move the root motion to avoid the collision. However, this might cause the character’s feet to slide more on the floor. 4. You can also generate an avoidance volume around the main character on the NavMesh, so all the Motion Director controlled crowd characters won’t go to that part of the scene. Simply select the NavMesh, go to Modify > Create Avoidance Volume. And place the avoidance area around the main character. (Remember to click Update if you moved or resized the volume) Soya Reallusion