Unit 17 - P2



Omniya Tajni
P2: Explain how visual effects are used to enhance audio-visual content

Visual effects are the process by which imagery is created or manipulated outside the context of a live action shot in film making. There are different types of visual effects:

Green screens and Blue screens are visual effects where you film a scene and can replace the green background with the actual background you need for the scene. The green screen effect is a post-production technique for compositing two images together. The colour green is used the most because it is the go-to as it doesn’t match any natural skin tone or hair colour, so when it comes to post-production no part of an actor will be edited out through Chroma key.

Chroma keying is a technique that is used to combine two frames or images by replacing a colour in one frame to be added to another frame.

Matte paintings are painted representations of a landscape, set or distant location that allows filmmakers to create the illusion of an environment that is not present at the filming location. They are one of the original VFX techniques used in film making and are usually painted on 3D glass to make it look realistic.

Computer generated images (CGI) are images that are created with no use of models as all the backgrounds and other elements are generated digitally. It is used for visual effects as the quality is often higher and the effects are more controllable than other physically based processes. Such as hiring extras for crowd scenes.

Morphing is a visual effect in motion pictures and animations that changes one image or shape into another through a seamless transition. This is used to create a sense of believability when there is no cut away and creates a sense of wonder and excitement amongst the viewer.

Rotoscoping is visual effects technique that is used to trace over motion picture footage, to produce a realistic action. It’s the process of painting on a visual effect after the sequence has been shot and removes any unwanted piece of the image. This is usually done by ‘Rotoscoping’ it out. 

Compositing is the combining of visual elements from separate sources into single images, this is used to often create the illusion that all those elements are parts of the same scene. Compositing is usually done through green screen and Chroma key.

The film that I have analysed that has included a lot of visual effects throughout the whole film is Harry Potter and the Deathly Hallows Part 2.

https://www.youtube.com/watch?v=ADmsqS8ce0E  1:17 – 1:25

Voldemort’s death scene has a wide variety of visual effect presented; most of the background is produced through CGI as they are creating backgrounds digitally   without using any models, this is only done through CGI. Although most of the background isn’t all a part of the scene. It allows us as the audience to see the real life like landscape and the producers have clearly added this background to make it more believable and create more of an effect to the audience. The background added here is filmed with a green screen and then CGI is added in post-production. This picture below shows how it looks before and after:



As you can see in the picture, Harry and Voldemort are having a fight with their wands, but in the film we are able to see the actual light and colour coming out of it, this done through Rotoscoping as the wand is used to trace over in order to produce the realistic action. Compositing is also done here as the two lights coming out of the wand collide as one overtakes the other, this allows the audience to see the illusion created and make us an audience believe that the fight is occurring between the two and with the composition added we are able to see how the light from the two wands collide and the audience can identify who is overtaking the other. This is the different compositing layers that were added to make it more believable:
This is the different steps taken to compost a layer

CGI in this film is also used during the school scenes, without the producers having to hire a lot of extras to take part in being extra students in the film, CGI allowed them to create duplicates of students. This adds the believability that due to the fact some of the locations are in the school building it is predicted to have a lot of students so adding extras through CGI not only saves time hiring them but makes it more realistic to the audience and allows the audience to identify that this is a busy and famous wizarding school. This is one example that was done to the school;
https://www.youtube.com/watch?v=g_C10VSInrA         0:47 – 1:04
This is the effect the green screen has on adding 'extras'

Comments

Post a Comment

Popular posts from this blog

Unit 17 - M1 [Resubmission]

Image
Omniya Tajni M1: Discuss the issues and risks for the proposed multiple effects Before our production, my partner and I planned any risks that may occur during the production and post-production process. Here is our risk assessment for the risks of the production as a whole: However due to the fact this is a production where it will require us to use visual and special effects there are separate risks that apply to that. The main legal and ethical risk that was predicted for the production, is making sure the actors that will be in our film sign the consent forms before the filming takes place. This would not give us a problem later on in the distribution of the product as we will be able to distribute the products anywhere because the actors have given us their consent to appear in front of the camera and allow us to do what we like with the footage we have recorded with them in it. Due to the fact that we will be using visual effects and the genre for our produc...
Read more

Unit 17 - P5

Image
Omniya Tajni P5: Source special effects footage in line with production plan Special Effects Vlog This is evidence we took while making our special effects scale model:
Read more

Unit 17 - M1

Image
Omniya Tajni M1: Discuss the issues and risks for the proposed multiple effects Before our production, my partner and I planned any risks that may occur during the production and post-production process. Here is our risk assessment for the risks of the production as a whole: However due to the fact this is a production where it will require us to use visual and special effects there are separate risks that apply to that. The main legal and ethical risk that was predicted for the production, is making sure the actors that will be in our film sign the consent forms before the filming takes place. This would not give us a problem later on in the distribution of the product as we will be able to distribute the products anywhere because the actors have given us their consent to appear in front of the camera and allow us to do what we like with the footage we have recorded with them in it. Due to the fact that we will be using visual effects and t...
Read more