What Is VFX? The Ultimate Guide for Filmmakers
- scottservante
- Jun 23
- 6 min read
So you're sitting there watching your favourite superhero movie, and Iron Man comes blazing across the screen in one of his suits. Or maybe you're mesmerised by those epic dragons in House of the Dragon. Either way, what you're seeing is pure magic – but it's not just the camera that's doing it. It's all thanks to visual effects, or VFX.
We've had a front-row seat at Black Hangar Studios to the evolution of visual effects. As the leading film production studios UK and having teamed up with heavy-hitters like Disney, Lucasfilm, Netflix, and the BBC, we've seen firsthand the impact VFX has on creating cinematic experiences. Want to know what is VFX? Strap in because we're about to fill you in.

Understanding What Is VFX: The Foundation of Modern Filmmaking
In filmmaking, visual effects, or VFX for short, mean making scenes that aren't part of a live-action shot. This technology lets filmmakers bring impossible worlds, crazy stunts, and fantastical creatures to life.
In Hampshire, our facility has been home to loads of productions. With our massive 32,000 square foot stage and the UK's biggest green screen cyclorama, we've had the chance to host all sorts of productions. This gives us a pretty good idea of what the industry truly demands and needs.
The Evolution of Visual Effects
If you want to understand what VFX is, you have to first know where it came from. Visual effects started with matte paintings and miniature models. Over time, it's evolved into incredibly realistic digital environments that are changing the way we tell stories.
Back in the 70s and 80s, Star Wars was the first to really bring together practical effects and optical compositing. Now, productions blend live-action footage with computer-generated imagery in a way that was previously unthinkable.
What Is VFX in Film: Breaking Down the Process
When we discuss what is VFX in film, it means breaking down a multi-stage process. At Black Hangar Studios, we've simplified things for our clients.
Pre-Production Planning
VFX planning gets underway before cameras start rolling. This process includes:
Concept visualisation: Drawing up previs and concept art
Technical planning: Figuring out what effects will be real vs. digital
Budget allocation: Weighing the costs of different VFX options
Getting the workflow set up: Connecting the practical and digital teams
Our team at Black Hangar Studios – we've worked with all kinds of productions – music videos, major feature films, you name it. And that's taught us exactly what is the VFX planning process is.
Production Phase VFX Considerations
During filming, several VFX elements come into play:
Our facility is home to the UK's largest permanent green screen, ideal for swapping out backgrounds.
We capture every detail of an actor's performance, which is then used to create realistic digital characters.
We combine practical on-set effects with digital enhancements in post-production, getting the best of both worlds.
Our team collects valuable data on lighting, cameras, and environments to help inform post-production decisions.
What Is VFX in Movies: Categories and Applications
Understanding what is VFX in movies means looking into the various types of visual effects.
Compositing and Environment Creation
Compositing is all about bringing together multiple visual elements to create one seamless image. At Black Hangar Studios, we've worked on lots of productions that have used our green screen facilities for:
Background swap: Putting actors in places they couldn't really be
Set extensions: Making physical sets bigger with digital tricks
Weather effects: Adding stuff like rain, snow, or haze
Sky swap: Creating cool or imaginary skies
Character Animation and Digital Doubles
Digital characters and doubles of real actors are pretty common. You see these kinds of special effects in movies all the time. Some examples of how VFX is used in films include:
Creature Creation: From dragons to aliens, digital creatures are a big part of today's movies.
Digital Doubles: When actors need a break from doing crazy stunts.
De-ageing and Enhancement: Tweaking how actors look to fit the story.
Crowd Simulation: Bringing massive crowds to life without the huge cost.
Destruction and Simulation Effects
Some of the most spectacular examples of what VFX can do involve:
Making safe, manageable destruction effects
Creating realistic or enchanted water effects
Smoke, dust, debris, and magical elements
Realistic fabric and hair movement in digital worlds
VFX vs CGI: Understanding the Distinction

At Black Hangar Studios, we often get asked about VFX vs CGI. While people tend to use them interchangeably, they have different meanings.
What Is CGI?
Computer-generated imagery, or CGI, is all about creating images entirely with computer graphics. It's all about building elements from the ground up using software.
VFX vs CGI: The Broader Picture
VFX vs CGI comparison reveals that VFX is the broad term covering all visual effects, including:
CGI: Computer-generated elements
Compositing: Combining multiple sources
Colour correction: Enhancing or altering colours
Digital matte painting: Creating digital backgrounds
Motion graphics: Animated graphic elements
The VFX vs CGI distinction comes in handy when filmmakers need to decide which way to go for their project.
The Technical Infrastructure Behind VFX
Major Studios and Production Houses like Disney and National Geographic have given us valuable insight into what is VFX. We've learnt that you need to appreciate the tech that makes it happen.
Hardware Requirements
Modern VFX demands significant computing power:
Rendering Farms: Computers teaming up to crunch complex visual effects.
High-End Workstations: The best computers built for heavy 3D work and compositing.
Storage Solutions: Loads of storage space to handle big video files and project assets.
Network Infrastructure: Fast connections for seamless collaboration and file sharing.
Software Ecosystem
The VFX industry relies on specialised software:
3D Animation: Maya, 3ds Max, Blender
Compositing: Nuke, After Effects, Fusion
Simulation: Houdini for complex simulations
Rendering: Arnold, V-Ray, RenderMan
Colour Grading: DaVinci Resolve, Baselight
The Creative Process: From Concept to Screen
Knowing what VFX is all about means understanding how the whole process unfolds.
Concept Development
Every VFX sequence starts with an idea. This usually comes from one of four places:
The story needs some visual effects to work.
Their take on the narrative elements.
Real-world limits that need VFX to solve them.
Cheaper alternatives to pricey practical effects.
Previsualisation
Before production gets pricey, previsualisation helps a lot. This stage of understanding what is VFX in movies involves:
Storyboarding: Planning out scenes by drawing them
3D previs: Basic 3D versions of shots you want to film
Technical previs: Figuring out the details for complicated effects
Virtual scouting: Checking out virtual locations before building sets
Working with VFX Professionals
Pulling off great VFX requires a team effort. As the leading film production studios in the UK, we're all about making these collaborations work.
VFX Supervision
The VFX supervisor plays a key role. They work closely with the director to make sure the visual effects meet their artistic goals.
Production Planning
Effective VFX means being involved from the start of the production process.
You need to spot VFX needs early on to plan ahead.
You have to set aside enough resources for VFX work.
VFX timelines must match the overall production schedule.
Keep track of all VFX materials, so you can find them easily.
The Global VFX Industry Landscape
The question of what VFX is a global industry worth billions of dollars. So, where's all the VFX action happening?
Established Centres
Los Angeles: The hub for Hollywood's VFX, with big studios like Industrial Light & Magic calling it home.
London: A growing VFX hotspot, with companies like Framestore and Double Negative leading the way.
Vancouver: Tax breaks have triggered a VFX boom in the city.
Mumbai: Rapidly gaining ground as a major player in the global VFX scene.
UK VFX Advantages
As film production studios in the UK continue growing, several advantages emerge:
Tax breaks: Better tax deals for VFX work
Qualified workers: Training programmes turning out skilled VFX artists
State-of-the-art studios: High-end facilities like Black Hangar Studios
Backed by the government: Initiatives that support creative industries
Quality Control and VFX Standards
Understanding what is the VFX industry is requires appreciating quality standards:
Technical Standards
Resolution Requirements: Getting VFX elements to match the final product specs.
Colour Management: Keeping colour consistent across the VFX workflow.
File Formats: Choosing the right format for each stage of production.
Backup and Archiving: Safeguarding VFX assets through production.
Creative Review Process
Daily Reviews: Check in daily to see how work is going.
Client Approvals: Get client okay on VFX elements through a set process.
Final Quality Control: Do a thorough check before sending the final product.
Version Control: Keep track of all the different versions of VFX elements.
The Endless Possibilities of VFX
Understanding what is VFX opens up a ton of creative possibilities for filmmakers. At Black Hangar Studios, we worked with big names like Disney, Lucasfilm, Netflix, and the BBC. We saw how visual effects bring stories to life and captivate audiences. Moreover, the evolution of VFX in film is picking up speed thanks to new technology. This means high-quality VFX is now within reach for productions of all sizes.
Planning a music video or feature film means you've got to get a handle on the basics of the visual effects. Knowing what's what when it comes to VFX vs CGI can help you make smart decisions. Having the right technical setup is also crucial for creating visuals that stick in people's minds.
The future of what is VFX is looking pretty exciting. As technology keeps getting better and creatives push the limits, visual effects will only become more important.
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