UFCEKT-20-33D Modelling and Animation 3D Modelling & Animation Materials and Textures Maps

UFCEKT-20-33D Modelling and Animation Agenda Purpose of Materials and Texture Maps Material Types and Attributes Texture Maps The Hypershade Classic Shading Algorithms

UFCEKT-20-33D Modelling and Animation Materials and Texture Maps Geometry is only one aspect of creating a realistic object or environment Apply materials and textures is an essential aspect of creating realism in a scene Using materials and textures can create attributes such as colour, transparency, and shininess of an object. Materials are referred to as shaders in Maya Materials control how the light interacts with the an object’s surface Material nodes may be combined to create a shading group Shading group applied to an object to achieve desired surface characteristic Textures are image files that can act as input nodes for the various material attributes including a relief texture node that defines its surface as a bump map Properties of materials and texture nodes can be viewed in an interface called the Hypershade

UFCEKT-20-33D Modelling and Animation Materials Types Anisotropic. This material has elliptical specula highlights Blinn. Provides soft circular highlights and is good for metallic surfaces Lambert. This material has no highlights and is useful for cloth and non- reflective surfaces Layered Shader. Combines several shaders into one single shading object Phong. Provides hard circular highlight and is good for glass surfaces Phong E. Similar to Phong, but optimised to render faster Shading Map. This material allows for colour changes to the rendering which provides cartoon shading Surface Shader. Provides a connection to a surface material attributes Used Background. Allows for adjustment and control of an objects shadows and reflections

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation

UFCEKT-20-33D Modelling and Animation Materials - Basics Anisotropic - surfaces with micro faceted grooves and specula highlights, e.g hair stain and CDs have anisotropic highlights Lambert - matt surfaces - no specula highlights good for matt surfaces - e.g paper Blinn - good specula highlights - Good for glass and metal surfaces Phong - good specula highlights - Good for plastic surfaces

UFCEKT-20-33D Modelling and Animation Classic Shading Algorithms Gouraud Shading, named after Henri Gouraud, is a method to simulate the differing effects of light and color across the surface of an object. Gouraud shading is used to achieve smooth lighting on low-polygon surfaces without the heavy computational requirements of calculating lighting for each pixel. Gouraud first published the technique in Gouraud Shading

UFCEKT-20-33D Modelling and Animation Classic Shading Algorithms The Phong interpolation method works better than Gouraud shading when applied to the Phong reflection model or to any reflection model that has small specula highlights. This methods were developed by Bui Tuong Phong, who published them in his 1973 Ph.D Thesis at the University of Utah. Phong Shading

UFCEKT-20-33D Modelling and Animation Texture Maps Image files can be ‘mapped’ to geometry to provide authentic surface detail and characteristics. Mapping is controllable through the attribute editor for placing textures on objects. Texture maps are also useful for providing a look for an object where a high level of detail is not required for an objects geometry - brick walls, guitar fret board for example. Texture maps can also be used to replace distant geometry where level of detail (LOD) is such that it permits the substitution of the geometry with a textured primitive object. Texture maps can themselves be combined with other shader nodes to provide layered texturing characteristics to achieve the desired modelling effect

UFCEKT-20-33D Modelling and Animation U V Mapping UV Mapping is the process of mapping a 2D coordinate grid to a 3D model the U maps in the x plane and the V maps to the y plane The 2D grid is associated with a corresponding image file to place on the model A single image can contain several component images which ‘map’ to regions on the 3D model Maya provides facilities to create a Photoshop.psd within the Maya environment which can then be edited within Photoshop to create the desired image map and then view the updated image inside Maya UV mapping is often used within games to apply the artwork to polygon geometry within the game environment

UFCEKT-20-33D Modelling and Animation UV Texture Mapping Example

UFCEKT-20-33D Modelling and Animation Environment Mapping Environment mapping is where an image is used to map onto a surface to give the effect of the surface reflecting the surrounding environment. Image to be used as an environment map

UFCEKT-20-33D Modelling and Animation Environment Mapping surface image to use as environment map

UFCEKT-20-33D Modelling and Animation Environment Mapping Result Renderer: Maya Software Format:.tga 1024 x 768

UFCEKT-20-33D Modelling and Animation Environment Mapping Result Renderer: Mental Ray Format:.tga 1024 x 768