Casting Smarter: Actor Backgrounds and Production Efficiency in P-Cap and VO

Casting for performance capture (P-cap) and voice-over (VO) in games has a direct impact on how smoothly production runs once recording starts.

An actor’s training background shapes how they take direction, how consistently they can repeat performances, and how cleanly their work moves through animation and audio pipelines. 

Having a practical understanding of those differences helps you anticipate where things might slow down, and where they’ll likely run smoothly.

In this article, I break down a few common actor backgrounds and how they map to production realities, based on experience across VO, P-cap, theatre, and film.

As a warm-up, check out this video about the making of Indiana Jones and the Great Circle (2024, MachineGames). Keep an ear out for how the actors talk about P-cap and how it’s different from more traditional forms of acting.

Once recording starts, differences between performers tend to show up in practical ways.

For example:

• Some actors take direction once and immediately adjust, others need it repeated a few times before it really lands.
• Some stay steady across a long session, others start strong but drift after a few hours of repetition.
• Some takes turn straight into usable material, others need small corrections before they fit the scene.
• Some sessions move quickly through planned work, others slow down as adjustments start to stack up.

In P-cap, this becomes even more noticeable because performance is tied directly to repeating physical actions inside the capture space. 

In VO, it tends to show up in how consistent a character feels across multiple takes of the same line, especially when direction shifts in tone or intent.

Training doesn’t determine talent, but it does shape working habits.

It shows up in things like:

• How quickly someone picks up and applies direction.
• How consistent they are when repeating the same action or line.
• How easily they switch between variations of a performance.
• How stable they stay when the session runs long or gets technically interrupted.

Theatre actors are used to building and repeating a performance across full runs, with consistent physical structure and timing. They’re strong at spatial awareness, precise blocking, and sustaining energy across long periods of repetition.

In P-cap, that shows up as reliable movement and clean consistency across takes, especially in sequences like combat or traversal where physical continuity matters over many repetitions.

Theatre training brings a lot of strengths into P-cap and VO, but there are a few areas that usually need adjustment when moving into more camera- or mic-driven work.

Stage performance is built to read clearly to a live audience, often at a distance. Because of that, even when blocking is precise, the actor's energy can come across larger than what a capture setup expects. In facial or cinematic capture, this can show up as expressions or gestures that feel a bit pushed and needs to be toned down to feel natural in close-up.

Theatre actors are used to sustaining performance through long, uninterrupted runs. In P-cap, work is broken into technical segments and repeated takes, so the performance has to stay consistent even as small technical details are reset between attempts. That shift can take some adjustment, even though the actor's underlying repetition discipline is strong.

Theatre work is strong at carrying clear emotional arcs, but VO often requires more controlled variation between closely recorded takes. When recording multiple versions of the same line, actors can sometimes hold the emotional shape too consistently, where interactive dialogue may benefit from more variation in tone or intent.

• Strong consistency reduces cleanup later. You usually get very repeatable physical work, which helps keep animation clean in P-cap.
• More time is needed early to adjust performance size. Stage training can make performances feel a bit big on camera, so the first part of a session often goes into scaling the performance down so it reads naturally in close-up.
• Reliable continuity once everyone is aligned. After that initial adjustment period, takes tend to stay very stable across longer sessions.
• Less natural variation in VO reads. Performances are often very consistent, so you may need to ask more directly for different tonal options in interactive dialogue.
• Cost shifts to the front of the process. You typically spend more time shaping the performance early, but save time later on fixes and cleanup.

Screen-trained actors are used to working for the camera, where performance is smaller, closer, and more controlled. They typically have strong control over facial expression, adapt well to micro timing adjustments, and maintain consistent emotional continuity across takes.

On set, for example, this shows up in how quickly they respond to small adjustments like “hold the reaction a bit longer,” “look in that direction,” or “less intensity on the first line,” while still staying anchored in the emotional intent of the scene.

That carries over well into cinematic P-cap and facial capture work, where small shifts in timing or expression can have a big impact on how believable a moment feels.

While screen training transfers well into P-cap and VO overall, there are a few spots where things can take a bit of adjustment once production gets more technical or repetitive.

In P-cap, one common challenge is physical consistency across repetition. 

Screen work usually prioritizes getting a strong take rather than repeating the exact same movement over and over, so in capture you can sometimes see small variations creep in (e.g., slight timing shifts, changes in foot placement, or differences in how a movement is hit from take to take). In animation pipelines, those details matter more than they would on set.

Another thing that comes up is spatial consistency in the capture space. 

On a film set, movement is usually built around camera framing and can shift depending on coverage. 

In P-cap, the performance needs to stay clean and repeatable within a fixed tracking area, and screen-trained actors can sometimes naturally lean toward “playing to camera” rather than maintaining a consistent physical pattern.

In VO, the main adjustment is often around vocal consistency between takes. Screen actors are used to supporting emotion with facial and physical detail, but in VO everything has to live in the voice alone. When multiple direction changes are recorded in a row, it can sometimes lead to slightly less separation between versions than a game session typically needs.

• They're quick to find a usable performance range. Because they’re used to camera work, screen actors often settle into the right level for P-cap and cinematic scenes fairly quickly.
• They're efficient at taking direction. Small notes and adjustments are usually picked up fast, which helps keep sessions moving without losing the emotional flow.
• They maintain strong consistency in emotional performance. You typically get believable takes that hold up well across cinematic sequences.
• Some physical repeatability may need tightening in P-cap. Since screen work focuses on individual takes, you can sometimes get small differences in movement across repeats that need smoothing out for animation.
• Their movement can be shaped around camera habits. Actors may naturally think in terms of framing rather than fixed spatial repetition, which can need a bit of adjustment in a capture space.
• VO variation can be quite subtle. Performances are usually well-controlled, but you may need to ask for clearer differences between line reads in interactive dialogue.
• Cost shifts toward refinement. You get up and running quickly, but you may spend more time tweaking details to match technical needs.

If you want to dig a bit deeper into the differences between theatre and screen acting, I highly recommend checking out Ian McKellen’s take on it.

This is also an amazing comparison by Tristan Spohn of how the same scene can play out differently in theatre versus film.

VO actors are trained to perform without physical support, so everything is carried through the voice, which typically results in a stable character voice across long or fragmented sessions, fast adjustments between different emotional directions, and clean repetition of lines without the character losing its identity.

In game VO sessions, it’s common to record several versions of the same line back-to-back (e.g., calm, aggressive, urgent, tired). VO-trained actors tend to handle those shifts smoothly without the character feeling like it changes persona from take to take.

Another important factor in games is pickups. Months later, you might need to re-record a line, and VO-trained actors are often more consistent with stepping back into the same vocal space, even after a long gap.

VO actors are used to performing without physical support, so everything is carried by the voice. That skillset is very strong in audio work, but it can take some adjustment when you move into physical or camera-based performance.

In P-cap, one common challenge is physical expressiveness. Because VO work doesn’t require the body to carry emotional detail, actors can sometimes underplay or under-detail the physical side of a performance early on (e.g., things like weight shifts, gesture clarity, or how emotion travels through the body). Those elements matter a lot once performance is being translated into animation.

Another thing that can show up is movement-to-voice alignment. In VO, timing is flexible and often led by the line itself. In P-cap, the physical action and vocal delivery need to lock together more tightly, especially for gameplay or cinematic continuity. That usually takes a bit of adjustment if you’re not used to expressing emotion through both the body and the voice at the same time.

In on-camera work, the main adjustment is often visibility of performance choices. VO actors are very strong at vocal nuance, but when that same emotional range is moved into a visual medium, it sometimes needs more conscious control over facial expression and physical restraint so it reads cleanly through the camera.

• Strong vocal consistency reduces audio cleanup later. You usually get clean line reads, which helps keep VO pipelines stable and easier to assemble.
• Fast vocal performance turnaround. VO actors are used to working from direction alone, so they can usually deliver solid takes quickly with little warm-up.
• More work needed on physical performance in P-cap. Because the body isn’t part of VO training, early sessions may need extra focus on gesture, weight, and physical expressiveness.
• Sync between voice and body can take adjustment. In P-cap especially, getting vocal delivery and physical action fully aligned can take some additional direction time.
• On-camera translation may need visual refinement. Strong vocal nuance doesn’t always translate into readable facial or physical choices on camera.
• Cost shifts toward performance integration. Less time spent fixing vocal issues, more time spent connecting voice, body, and camera performance so everything feels unified.

In the end, auditions remain your most useful signal.

Use the notes above on training backgrounds as a guideline rather than a fixed rule. Actors bring a lot of individual strengths, and those don’t always map neatly onto categories.

Understanding someone’s background can help you orient yourself a bit faster. It can point you toward where they’re likely to be most comfortable, and where you might need to give a bit more direction or support to get the best out of them.

It’s less about fitting people into boxes, and more about giving yourself a clearer starting point for collaboration and production planning.

So, use the audition to understand how an actor actually works, rather than how they perform a prepared read. Focus on:

• How they respond to direction in real time.
• Where their natural strengths show up (voice, physicality, timing, emotional control).
• How flexible they are when you change notes or ask for a different approach.
• How consistent they stay across multiple takes of the same material.

It’s also a good place to experiment a bit. If you know their background, whether that’s theatre, screen, or VO, you can try shifting the style of direction to see how they adapt outside their comfort zone.

In general, the most useful auditions aren’t the most polished ones. They’re the ones where you can clearly see how someone thinks, adjusts, and still stays connected to the character while doing it.

Casting decisions in games shape both the quality of performance and how smoothly production runs.

Understanding an actor’s training background can help you anticipate how they’re likely to work within P-cap and VO pipelines. It gives you a bit more context going in, so sessions tend to feel more predictable, with fewer surprises during recording and less cleanup needed later in animation, cinematic, or audio work.

At the same time, it’s worth keeping a light touch with all of this. These backgrounds are helpful signals, but they’re only part of the picture. Actors bring a wide range of instincts, skills, and creative choices that don’t always fit into categories, and that variety is a big part of what makes performance work in games so rich.

So the real value here is just orientation. A way to meet people a little closer to where they’re starting from, and give them the best conditions to do their work well.

• Training backgrounds are a helpful signal for how actors may respond to direction, repetition, and technical constraints in P-cap and VO, but they’re not fixed rules.
• Most production cost comes from adjustment work in-session and cleanup later, rather than from the actor’s overall talent level.
• Each background shifts where the effort goes, whether that’s early performance shaping, repeatability refinement, or aligning voice and physical performance.
• Auditions remain the most reliable indicator of real production behaviour because they show how an actor responds to direction, adapts, and stays consistent in real time.

If you want to learn more about directing for performance capture, I really recommend this book by Tom Keegan (unaffiliated).

And this video where voice and casting director DB Cooper explores techniques for developing characters, and tricks to help keep your voice actor on track while recording VO.