# Material Definition Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## \[Unreleased]

## \[1.2.0] - 2019-07-24

### Changed

* Moved to repository
* Switched to changelog markdown
* Re-defined basecolor to be in sRGB color space
* Set default basecolor to be 0.9 (which is 0.79 in linear space, a very bright white)
* Re-defined "alpha" as opacity factor Already was treated like it in three.js implementations, but not in Unity. Trying to remove discrepancies.
* Re-defined RGBA texture mapping's alpha channel to be alpha (in terms of opacity). Used for alpha clipping/testing as well

### Added

* Texture mapping ORM: combined occlusion, roughness, metallic texture
* Transmission factor and IOR to allow specular transmissive materials (glass) Note: No explicit transmission color. The base color is used.
* Added occlusion strength (used in real-time when occlusion textures are present)

### Removed

* Removed obsolete `specular` factor Referred to the specular-glossiness workflow, which is not supported

## \[1.1.0] 2018-12-10

### Added

* alphaCutoff
* doubleSided

### Changed

* Declared specular workflow obsolete

## \[1.0.0] - Initial Version

### Added

* Material properties
  * basecolor
  * roughness
  * metallic
  * alpha
  * specularity
* Texture properties
  * id
  * material
  * width
  * height
  * mapping (RGB,RGBA,XYZ)
  * url
  * mmWidth
  * mmHeight