The SFX department — entirely distinct from the VFX department, which works in post-production — creates physical, in-camera effects on set and on location. Their work happens in the real world, in real time, under the real camera.
Special Effects Supervisor
SFX Supervisor • Special Effects Co-ordinator
The creative and logistical head of the special effects department. The SFX supervisor reads the script, consults with the director and DP, and designs the physical effects plan for the entire production. They are responsible for all safety protocols, all equipment, and all personnel in the department. On large productions, the SFX supervisor may command a crew of 50 or more specialists. They liaise constantly with the VFX supervisor to determine which effects will be captured in-camera and which will be enhanced or replaced in post-production. The SFX supervisor’s instinct for what can be achieved practically — and what must be digital — is among the most valuable in the industry.
Pyrotechnician
Pyro Op • Explosives Supervisor
A licensed specialist responsible for designing, setting up, and firing all explosive and fire effects on set. Pyrotechnicians require government licensing and work under strict regulatory oversight. They design controlled explosions, fire rigs, bullet hits, and squibs — the small explosive charges used to simulate gunshots on actors’ clothing and on set surfaces. The balance between visual spectacle and absolute safety is the pyrotechnician’s constant challenge. Film legend holds that no two pyros are alike — their methods, instincts, and preferred devices vary enormously.
Mechanical Effects Technician
Mechanical FX Tech
Builds and operates the mechanical devices that drive physical effects: moving set pieces, hydraulic rigs, pneumatic launchers, collapsing walls, breakaway glass, hinged floors, and all other mechanically actuated effects. Mechanical effects technicians are machinists, engineers, and fabricators — building custom equipment for each production and operating it with precise timing relative to the camera and the actors.
Atmospheric Effects Technician
Weather FX • Rain Rigger • Wind Technician
Creates rain, snow, fog, haze, dust, and wind effects on set. Rain rigs — the overhead pipe systems that deliver controlled rainfall on demand — are among the most common practical effects and among the most technically complex to manage: water pressure, volume, coverage area, and drainage all must be coordinated to match the DP’s visual requirements. Atmospheric effects technicians also operate atmospheric haze generators, snow and dust cannons, and forced-wind rigs for exterior weather simulation.
Armourer
Weapons Master • Prop Armourer
Responsible for all real or realistic weapons used on set — firearms, swords, knives, and historical weapons. Armourers are licensed firearms dealers who provide, maintain, and supervise the safe use of weapons. They ensure actors handle weapons correctly, manage blank ammunition, and oversee all live fire sequences. In the wake of the fatal Halyna Hutchins shooting on the set of Rust (2021), armourer protocols across the industry came under unprecedented scrutiny and new safety rules were introduced by the IATSE, studios, and state regulators.
Foam & Breakaway Prop Specialist
Breakaway FX • Candy Glass Tech
Fabricates and prepares the soft, lightweight, or destructible props used when actors must collide with, fall through, or smash objects: breakaway furniture, candy glass (sugar glass that shatters safely), foam breakaway walls, and destructible set dressing. The goal is to create objects that look completely real on camera but pose no injury risk to stunt performers or actors.
Water Effects Technician
Water FX Specialist
Designs and operates underwater rigs, flooding effects, wave machines, and water tank environments for productions requiring aquatic sequences. Water FX technicians work closely with dive coordinators, stunt supervisors, and the DP to create controllable, repeatable water conditions. Productions like Dunkirk, 1917, and Pinocchio have required large-scale practical water effects that would have been impossible to replicate digitally at the required quality.
SFX Crew / Floor FX
SFX Technician
The floor-level crew who set up and operate all practical effects under the supervisor’s direction. They rig pyrotechnic charges, connect hoses to rain rigs, operate wind machines, control hydraulic equipment, and clean up and reset after each take. SFX crew are the physical workforce of the department — and among the most safety-conscious people on any film set.