Illustration Flashcards
Describe ambience
Ambience is the general overall mood applied through illustration techniques.
Describe Material Mapping
The application of a raster image for a
material being placed on the surfaces of a CAD model.
Describe Texture Mapping
A method of scaling a chosen material to fit it’s given application
Describe Bump Mapping
A technique for simulating bumps and wrinkles on the surface of an object.
This significantly improves textures, adding realism to materials.
Describe Ambient Lighting
An ambient light casts soft light rays in every direction. It has no specific directionality so
does not cast any shadows or shading
Describe Directional Lighting
A directional light mimics the lighting that you would get from the sun.
Directional lights emit parallel light rays in a single direction but the light reaches out into infinity.
Describe Area Lights
An area light is a light that casts directional light rays from within a set boundary, either a rectangle or circle.
Describe Point Lights
A point light is very similar to an incandescent light bulb that emits light in all directions.
Describe Spot Lights
A spot light behaves exactly how it sounds, like a real spot light, and provides a very direct source of light.
Describe Image Based Lighting
A 3D rendering technique which involves capturing a representation of real-world light as an image. This allows highly detailed real-world lighting to be used to light a scene
Describe HDRI
A photographic technique that improves luminosity in a photograph to capture the way our eyes interpret light.
A series of images are taken to capture the dark detail and light detail. These are then merged to ensure the image is clear and all elements are visible
Describe Depth of Field
The distance between the nearest and farthest objects that appear in focus in a photograph.
Using depth of field in a CAD illustration/ photograph results in a clear focal point, where the focus of the illustration is clear and the background/foreground is blurred to draw the eye directly to the key product/model being illustrated.
Describe Volumetrics
A technique for generating a visual representation of data that is contained in a three dimensional space (volume). It is used to render objects based on their complete structure as opposed to the surface render. These type of renders are used when trying to show detail within a volume, for example:
* Dust in a room
* Water in a swimming pool
* Smoke/mist within a scene
* Fire/heatwaves within a scene.
* Light rays within a room.
Describe Reflections
The highlights lights create on a 3D item as well as the reflection of the image onto differing surface textures.
Describe Specularity
The bright spot of light that appears on shiny objects when illuminated.
