TGA Physically Based Shader

A Physically Based Lighting CGFX real-time shader for Maya which was originally created to be used by our students at The Game Assembly for their 3D game projects. This shader uses a few different textures which differ from the traditional specular, gloss and reflectivity. For reference and discussion of this shader please visit this thread on the polycount forum. A big thank you to my colleague and friend Niklas Hansson whom I initially created this shader together with.

Highlight Features

A real life material based fresnel term that alters specularity and reflections.
A substance texture to mimic how materials reflect and refract light in real life.
A roughness texture to define a materials surface structure(smooth/rough).
Image based lighting via a cube map for reflections and ambient lighting.
Roughness controlled pre-blurred mip levels of the cube map for reflections.
Blended Normals to give a subtle skin effect in conjunction with normal maps.
Emissive Texture to fake emissive surfaces.
Fully linear shading pipeline.
A bundled cheat sheet image with color swatches for several substance values.
Shadow Map(pre-baked) support fully integrated with the shader (This feature is experimental and only works with one direct light source).
Transparency support through the Albedo texture alpha channel.
Energy conservation between ambient light and reflections.