footstep_particle_triggers = { { tiles = { "water", "water-shallow" }, type = "create-particle", particle_name = "water-particle", [...] }, { tiles = { "grass-1", "grass-2" }, type = "create-particle", particle_name = "grass-particle", [...] }, [...] }
footstep_particle_triggers = { { tiles = { "water", "water-shallow" }, actions = { { type = "create-particle", particle_name = "water-particle-1", [...] }, { type = "create-particle", particle_name = "water-particle-2", [...] }, [...] } }, { tiles = { "grass-1", "grass-2" }, actions = { { type = "create-particle", particle_name = "grass-particle-1", [...] }, { type = "create-particle", particle_name = "grass-particle-2", [...] }, [...] } } }