On-set prop that actually functions as intended during filming rather than being a non-working replica – includes items that light up, produce sound, dispense liquids, or perform mechanical actions, requiring coordination between props, electric, and special effects departments.
What is a Practical Prop?
A Practical Prop is a working prop that actually functions as intended during filming. Unlike Hero Props (non-functional), practicals fulfill their real-world function on camera.
Basic Principle
| Aspect | Description |
|---|---|
| Definition | Functional prop |
| Difference | From static props |
| Purpose | Authentic action |
| Coordination | Multiple departments |
Practical vs. Hero Prop
| Aspect | Practical | Hero (non-functional) |
|---|---|---|
| Function | Works | Visual only |
| Cost | Higher | Lower |
| Complexity | Greater | Simpler |
| Example | Working laptop | Laptop mockup |
Categories
| Type | Example |
|---|---|
| Electrical | Lamps, screens |
| Mechanical | Doors, locks |
| Fluid | Faucets, drinks |
| Pyro | Candles, lighters |
Electrical Practicals
| Type | Description |
|---|---|
| Lamps | Functional lighting |
| TVs/Monitors | Working screens |
| Telephones | With display |
| Appliances | Kitchen, lab |
Practical Lights
| Aspect | Description |
|---|---|
| Function | Actual light source |
| Dimming | Often required |
| Flicker-Free | Important for camera |
| Coordination | With gaffer |
Screen Practicals
| Type | Description |
|---|---|
| Playback | Pre-produced content |
| Green Screen | For post-replacement |
| Interactive | Real interfaces |
| Sync | With audio |
Mechanical Practicals
| Example | Description |
|---|---|
| Doors | Working locks |
| Windows | Opening/closing |
| Clocks | Running |
| Vending Machines | Functional |
Fluid Practicals
| Type | Description |
|---|---|
| Faucet | Running water |
| Coffee Machine | Real coffee |
| Bar Setup | Working tap system |
| Sprinklers | For effects |
Department Coordination
| Department | Role |
|---|---|
| Props | Sourcing, management |
| Electric | Power, dimmers |
| SFX | Mechanical effects |
| Sound | Audio playback |
Preparation
| Step | Description |
|---|---|
| Sourcing | Purchase or build |
| Testing | Functionality check |
| Adaptation | For camera |
| Backup | Have replacements ready |
Challenges
| Problem | Solution |
|---|---|
| Reliability | Tests, backups |
| Safety | Checks, permits |
| Timing | Rehearsals, cues |
| Noise | Quiet versions |
Camera Considerations
| Aspect | Description |
|---|---|
| Flicker | Check LED frequency |
| Brightness | Adjust to lighting |
| Angle | Optimize visibility |
| Reflections | Control |
Screen Flicker
| Solution | Description |
|---|---|
| Sync | Monitor to camera shutter |
| Frequency | 24/25/30 Hz match |
| LED | Flicker-free panels |
| Post | Replace if necessary |
Safety
| Aspect | Measure |
|---|---|
| Electrical | Qualified personnel |
| Water | Protect equipment |
| Fire | Fire safety |
| Mechanical | Safety clearances |
Budget Aspects
| Factor | Description |
|---|---|
| Purchase/Rental | Depending on availability |
| Modification | Custom work |
| Backup | Multiple units |
| VFX Alternative | Compare costs |
Practical vs. VFX
| Consideration | Practical | VFX |
|---|---|---|
| Interaction | Better | Complex |
| Reflections | Automatic | To simulate |
| Cost | Predictable | Variable |
| Flexibility | On set | In post |
Best Practices
| Practice | Reason |
|---|---|
| Plan early | Time for preparation |
| Test | Reliability |
| Have backups | Redundancy |
| Communication | All departments |
Continuity
| Aspect | Description |
|---|---|
| Status | Document on/off |
| Position | Consistent |
| Function | Same across takes |
| Reset | Between takes |
Today
Practical props remain indispensable for authentic film production. Despite advanced VFX capabilities, working props deliver interaction, reflections, and timing that are difficult to simulate. The best practice combines practicals for close-ups and interactions with digital solutions for complex or dangerous effects.