particle_system Cells { material Particles/Cells particle_width 0.1 particle_height 0.1 quota 80 cull_each true sorted true local_space true iteration_interval 0.0 nonvisible_update_timeout 0.0 billboard_type point billboard_origin center billboard_rotation_type texcoord point_rendering false accurate_facing false emitter Box { position 0.0 0.0 0.0 direction 0.0 1.0 0.0 angle 180 width 5 height 5 depth 30 emission_rate 60 velocity_min 1 velocity_max 1 time_to_live_min 15 time_to_live_max 25 duration_min 0 duration_max 0 repeat_delay_min 1 repeat_delay_max 2 colour_range_start 1 1 1 1 colour_range_end 1 1 1 1 } affector DirectionRandomiser { randomness 60 scope 1 keep_velocity false } affector LinearForce { force_vector 0 -2 0 force_application average } }