TG - Rendering Knowledge Flashcards
1
Q
What is texture mapping?
A
- Applying a texture to a surface of a CAD model
- Represents a real material
2
Q
What is bump mapping?
A
- Method of representing a bumpy or tactile surface on a CAD model
- Simulates bumps or wrinkles on a CAD model
3
Q
What is polygon modelling?
A
- Used to compose images in 3D
- Object is split into many polygons (used in STL files)
- Allows for texture mapping as polygons give a more realistic surface
4
Q
What is specularity in terms of lighting?
A
- Represents the amount of reflectivity a surface has
- Helps to calculate the highlights and shadows present on an object
- Creates ‘rings’ of reflection on an object
5
Q
What is image-based lighting (IBL)?
A
- Simulates how light and shadow from a real environment would interact with a CAD model
- Image is projected onto a dome or sphere which is used to simulate lighting for render scene
6
Q
What is a high dynamic range image (HDRI)?
A
- Creates multiple exposures of an image to change the way lighting interacts with a CAD model
- Enhances colour and shadow, plus creates a 3D environment for rendering
7
Q
What are volumetrics?
A
- Method of giving light volume in a render (easier to perceive)
- E.g. light passing through smoke, light through a window, through a forest canopy
8
Q
What is depth of field?
A
- Technique used to guide a viewer’s eye to a focal point in an image
- Certain areas are blurred to create foreground/background and to force viewer to see areas in focus
9
Q
What is a distant light?
A
- Emits uniform light from one place to another, specified by user
- Effects entire scene
- Intensity of light doesn’t diminish over distance, useful for uniform lighting
10
Q
What is a spotlight?
A
- Emanates from a single source, disperses in a cone over the scene
11
Q
What is ambient lighting?
A
- Lighting that effects the entire scene and all objects with equal intensity and colour
- Set by user, uniform and consistent, used to provide basic lighting to a scene
