- layer_group/draw_in_water_layer - It's not clear the similarities/differences between layer_group and layer
- effect_is_opaque - when false and effect_color has a<1 this doesn't seem to affect tiles which are above water
- trigger_effect - What trigger is this?
- effect_color - related to effect?
- effect - Related to water?
- vehicle_friction_modifier - could link to a page explaining the weight/power/friction system used for vehicles
- next_direction - explain multiple directions
- placeable_by - copy from entity
- autoplace - link to autoplace article
- decorative_removal_probability, map_color, walking_sound, walking_speed_modifier, can_be_part_of_blueprint