Category: Visual Effects

There are very few productions today that don’t use some kind of VFX. It has become an everyday facet of TV and movie production. And, to the uninitiated, the plethora of jargon can be confusing. Something in particular that comes up often is 2D vs 3D VFX.

On the surface, it sounds like 2D is akin to cartoon animation and 3D is more Pixar-esque CGI. But this couldn’t be further from the truth. When we talk about 2D or 3D VFX solutions, we’re talking about techniques that can be accomplished in either a 2D or 3D space. Still confused? Let’s explore the topic further…

 

2D vs 3D VFX Solutions

In reality, this isn’t an issue of one versus the other. Both 2D and 3D solutions have their place in the VFX world. There will be some instances where all you need is to use some 2D techniques, such as a 2D matte painting, to add to the scene. Other times, you’ll need an entire 3D model for your production. And sometimes you’ll need to use both at once.

As you can probably guess, 2D effects work in a 2D space, which means there isn’t any “depth” or “dimension” to it. They’re useful if the camera is moving on an X and Y axis (left and right and up and down). 3D, on the other hand, adds more depth to the shot and are used when they’re likely to be front and centre and under more scrutiny. So 3D visual effects are more often used to create CGI characters or other objects (such as vehicles, planes, or spaceships) that are integral or important to the story being told.

 

2D

Let’s go into more detail about some of the more common 2D VFX solutions and techniques.

Matte painting

Matte paintings are one of the oldest techniques in the book. In the past, they used to be painted onto glass. Today, we can use digital painting software to create something that looks incredibly realistic. Often 2D matte paintings can be created using still images or elements from still images. However the effect is accomplished, the goal is the same: to create a convincing background for the shot.

Beauty and de-ageing

2D paint techniques can be used to remove blemishes, bags, and wrinkles on actors but also to age actors or make them look younger or older. Increasingly actors are being aged and de-aged to help tell stories cover long time periods.

Crowd replication

2D compositing can be used to create crowds for indoor and outdoor scenes. By shooting plates with a relatively small number of extras, a relatively empty cinema, theatre, or football stadium can be made to look full. 

Muzzle flashes 

These are a staple of many TV shows and films and are easily achieved using 2D visual effects. If suitable elements can be sourced, almost any kind of weapon or artillery can have a muzzle flash and smoke added.

Blood and gore

Many shows require blood or gore to be either added or enhanced to actor’s faces and bodies. In most instances, with good elements, this can be achieved with 2D effects.

Tracking

Tracking in a 2D sense is about following objects on-screen on the X and Y axes. With 2D tracking, you’re likely to be following a number of points in the image, something which can be made easier by placing dots or tracking markers during filming.

 

3D

3D VFX haven’t been around as long as some of the techniques used in 2D VFX, but you can achieve everything that can be done in 2D with 3D. Here are some common 3D VFX solutions:

Assets

Your CG assets will most likely be 3D. They will need to blend into the scene so need to appear as if they are at home in a 3D space. In today’s world, even the most innocuous of items will be CG assets. It could be a giant spaceship, or it could be a futuristic gun. It could even be a cardboard box if you need it to be.

Match moving

This is another term for 3D tracking. It involves extracting the camera movements from the live-action shoot and replicating it in a CG environment. There was a time where this process was laboriously done by hand but with advances in post-production software, this is much simpler. This is a necessary process if you want any 3D assets to move with the shot as if it was always there.

Particle effects

When you need to go even smaller, you can use particle effects. These can be added after filming to prevent them from being cumbersome for your actors. So if you have a fire in a scene, you can create realistic-looking smoke or embers. If it’s supposed to be a winter scene, add snow. Is it raining? You can create individual raindrops. Modern systems are capable of creating particle effects that appear and disappear over time, as they would if they were real.

Lighting

This is used in tandem with your 3D assets. To make them look as if they are actually in a scene, the lighting and shadows need to match the environment around them. It also adds depth and helps cement the asset in the scene.

3D matte painting

You aren’t seeing things – matte painting is in both the 2D and 3D section. A growing area in 3D VFX, 3D matte paintings are a way of creating a 3D environment illusion by creating a layered digital painting. In the past, they would layer different panes of glass, but now we can use digital programs to create simple 3D geometry that matches the environment. It saves you the effort of creating incredibly detailed 3D models if the shot doesn’t call for such level of detail.

2D and 3D

All of these techniques are integral to post-production VFX. Different situations will call for a mixture of them all. Maybe you need a matte painting to show a war-torn London in the background while your 3D alien wreaks havoc in the foreground.

While most shows will require some 3D VFX, the majority still use 2D visual effects for their shots. The amount of 3D you have versus 2D will depend on your budget and the time available. If you project has lots of 3D elements – such as characters, assets, or even environments – you will need more time and budget to achieve them

What solutions you need will depend entirely on your individual circumstances. Today, it is much cheaper and quicker to use VFX to solve any problems you have.

If you need a VFX company to support you during your production, look no further than REALTIME. You can see our impressive CGI work in the upcoming BBC adaptation of War of the Worlds. If you would like to know more about what we can do for you, or if you’d like advice on 2D vs 3D VFX get in touch with me at [email protected].

Welcome back to part two of our ‘VFX for dummies’ series! We know you could be a veteran of the industry but still be unsure about this rapidly changing field of TV production. What CGI and VFX are might not be immediately obvious to you. So if you’ve ever tried to research the topic to gain a clearer understanding, you might have left more confused than before.

Like any highly technical specialisation, VFX has its own dictionary of industry terms that can – on the surface – appear confusing. But we’re here to demystify some of the most common terms and break them down for you.

TV VFX

8-bit/16-bit

This refers to the bit depth of your footage, i.e. how much colour information is stored in your imagery. The more colour information it has, the more colours you have available. The higher the bit depth, the more colours it can store. This term is common when discussing concepts like ultra-high-definition (UHD) or high dynamic range (HDR).

 

Assets

These are your 3D models – what you might think of when you think ‘VFX’. They can be as large or small, or as noticeable or inconsequential as you want. It can be anything from a plane to a three-legged war machine, a tree to an animal, or a box to an even smaller box.

 

CGI

Computer-generated imagery. As the name suggests, these are the visual elements of your production that are created on a computer. Often used to refer specifically to 3D Computer Animation or as another term for Visual Effects or VFX. CGI and VFX are not the same though. CGI – and its integration – can be considered part of the VFX process.

 

Compositing

The combination of at least two source images to create a new integrated image. Compositing happens  when you put all your different ‘elements’ together – your 3D assets, your backgrounds, your particle effects, and your actual on-set footage.

 

EXR

See OpenEXR.

 

High dynamic range (HDR)

This is a common term used in relation to next-generation TV’s which can deal with a larger than normal dynamic range. Dynamic range relates to the brightness values in a scene or image, from brightest to darkest, often expressed as a ratio. In a digital image, it also relates to the total number of different colours in the image. Streaming content providers like Netflix and Amazon have spearheaded the drive in the industry to deliver films and series to HDR standards. 

 

Keying

Keying is the process of algorithmically extracting an object from its background and combining it with a different background. To help with this process, productions use a ‘green screen’ or ‘blue screen’ to shoot against. This is used so, during the keying process, you can cut out the green or blue colour and insert your own background digitally. Ideal in situations where a location does not exist so needs creating (such as an alien planet) or where it is too dangerous to have the actor in that situation (such as in a special effects explosion).

 

Matte painting

From the small to the large, sometimes you need to create entire landscapes. You may be able to use a matte painting, which is a 2D, digitally drawn background that can be added to your scene. Before digital production became the industry standard, matte paintings were painted onto glass. The paint techniques used now are created using software like Photoshop, Nuke, Mari, and ZBrush.

 

OpenEXR

This is a specific image file format designed for use with High Dynamic Range (HDR) imagery.

 

Parallax

Parallax is defined as the perceptual difference in an object’s location or spatial relationship  when seen from different vantage points. Parallax is an effect which can be used to add more depth to 2D shots. You can adjust focus and depth of field to make certain elements appear closer to or further away from the camera, adding depth to a 2D shot.

 

Particle system / particle effects 

A 3D computer graphics technique that is used to create a large number of objects that obey well-defined behavioural rules. Useful for controlling multitudes of discrete objects, such as asteroids or flocks of birds, but also as a tool for creating natural phenomena such as fire, smoke or water. Particles are small 3D elements that add tiny details to a shot. If there’s a fire, you’ll need rising embers and smoke. If there’s rain, you’ll need small droplets.

 

Pipeline

A pipeline is the generic term used to describe a set of processes for achieving a certain result. It is most commonly used to describe the VFX pipeline. The VFX pipeline covers all the processes from pre-production through to post-production and delivery. It involves many things in this glossary, including previz, matte painting, and tracking. Creating a robust and efficient pipeline is a key part of developing a successful VFX company.

 

Previz (abbreviation for previsualisation)

Previs is a collaborative process that generates preliminary versions of shots or sequences, predominantly using 3D animation tools and a virtual environment. Previs is used by filmmakers to explore creative ideas, plan technical solutions to shooting, and to help the whole production team visualise how finished 3D elements will look in the final project ahead of final animation being completed.

 

Rotoscoping

A rotoscope was originally the name of a device patented in 1917 to aid in cel animation. It is now used as a generic term for ‘rotoing’. This is the process of cutting someone or something out of a more complex background to use them in another way. For example, you might want to put a VFX explosion behind your actors as they walk away from it towards the camera. You would need to rotoscope them out of the shot so you can place the explosion behind them but in front of the background scenery.

 

SFX

Special effects. While these aren’t visual effects, it’s worth defining how the two are different. While visual effects are digitally created assets, special effects are real effects done on set – for example, explosions or stunts. It can also include camera tricks or makeup. People often confuse SFX and VFX.

 

Texturing

When 3D models are first created, they are just blank shapes with no realistic details on them. Texturing is a process which is akin to painting the model – giving it a skin or surface.

 

Tracking

Tracking is the process of determining the movement of objects in a scene (relative to the camera) by analysing the captured footage of that scene. 2D tracking is dependent on tracking points in the image. These can be tracking markers placed there or points on objects being tracked. 3D tracking  – also referred to as match moving – is the process of extracting the camera move from a live action plate in order to replicate it in a computer generated (CG) environment. A match move is often created by hand, whereas 3D tracking is done with specialist software. 3D tracking is used to recreate the movements of a camera in a digital space. So, for example, you have a shot that pans from left to right. When you add in your 3D asset, it needs to move from left to right in the same way at the same speed so it looks as if it was actually there.

 

VFX

VFX stands for ‘visual effects’. It is a very broadly used term used to describe just about anything that cannot be captured through standard photographic capture

 

Speaking of which, it’s time to end another entry in our VFX for dummies series. We hope this has helped you understand the often complex world of VFX. There’s more to come in the series so check back regularly. Next time, we’ll discuss how to plan your CGI elements to make filming your TV show that much easier.

We know VFX can be confusing to even the most experienced industry veteran. But at REALTIME, we make the process as stress-free and easy as possible. If you need CGI elements in your upcoming project, get in touch with me on [email protected] to see how we can help.

We are in a golden age of visual effects. CGI visuals have never been more in demand. Your expertise in the industry may lie elsewhere so you might not realise the actual breadth and depth of what a VFX supplier like us can provide.

3D VFX are more than an alien invasion or a superhero fight. VFX is a multi-faceted process, one that we will break down over the course of our ‘CGI for dummies’ series! With our three-part adaptation of War of the Worlds looming, we couldn’t think of a better time to dive into the world of 3D visual effects for TV.

 

What is VFX for TV shows?

At its most basic, visual effects (VFX) are the imagery created, altered, or enhanced for a production. They accomplish that which cannot be done during live-action shooting. They aren’t to be confused with special effects (SFX) which are usually done on location during filming. Explosions are a common example, though they are also being replaced by digital recreations as these are safer and cheaper.

On a large scale, they can create the impractical or impossible, such as new background environments, props such as planes, trains, or boats, or life-like animals and creatures. But they are also frequently used for small, simple fixes and to save time and money.

As we said, they aren’t limited to your big-budget action flicks. Today, you’ll be hard-pressed to find a movie, TV show, or advert that doesn’t use VFX in some way. In the coming months, we’ll be covering everything VFX. Here’s what you can expect in our upcoming series.

 

Demystifying industry terms

Like any industry, the VFX sector has its own dictionary of jargon. It can make the VFX process seem like a Gordian knot, but every term has a simple definition. In this blog, we’ll break down the ABCs of VFX in an easily digestible way. You can learn terms like keying, which is where you replace the green from a green screen with whatever background you like.

 

How to plan your CGI elements

Creating your CGI elements is one thing; planning them is a whole other process. From concept art to pre-visualisation, we’ll guide you through the process of planning the integration of your assets. You can’t expect to direct your show if you don’t know where your assets will be and when. Look out for our simple step-by-step guide in the future.

 

Asset building

This might be the first thing you think of when you think ‘VFX’ – creating 3D assets for the production. You can create anything you can think of: from a squadron of planes to a giant three-legged machine and a simple crate, whatever you need. But even this aspect has multiple parts to it. We’ll save the details for a future blog, so keep your eyes peeled.

 

Particle effects

3D modelling can cover even the tiniest details, including particles like smoke or dust. Particle effects – or particle systems – are made up of tiny particles that, when combined, create the illusion of a greater entity. They will also have their own ‘lifespan’ of sorts, so you can realistically create something like embers in a fire or droplets of rain. The smallest details can make the biggest difference, so look out for a blog on this in the future.

 

2D vs 3D

If you read 2D and thought we were talking about animated cartoons, then this blog will be for you. Because when we say 2D, we’re talking about visual effects that can be achieved in a 2D space, as opposed to a 3D one. For example, your backgrounds might be 2D matte painting backdrops placed behind your actors. While 3D VFX are great, you can achieve an awful lot more cost-effectively with 2D VFX. We’ll dive into this topic more in a future blog.

 

CGI vs practical effects

How do you know when to use practical effects or CGI? Is a practical explosion better looking than a CG one? Hopefully, we’ll be able to break down the pros and cons of both for you, so you can figure out how to save yourself time and money during production. Look out for that blog in the near future.

 

Creating realistic, seamless 3D visual effects takes time and effort. Over the coming months, we hope you’ll find a new appreciation for this art. Check back regularly for another taste of the world of VFX. We hope to see you soon!

At REALTIME, we have the staff and expertise to carry out everything we just talked about. So if you have an exciting project in the pipeline and would like to discuss your visual effects needs, please get in touch with me at [email protected].