Material

• https://github.com/ousttrue/UniGLTF/issues/12
• https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#reference-material
• https://github.com/KhronosGroup/glTF/blob/master/extensions/2.0/Khronos/KHR_materials_unlit/README.md

Color

GLTF	Unity
/materials/*/pbrMetallicRoughness/baseColorFactor	material.color	shorthand of material.SetColor("_Color", color)
/materials/*/pbrMetallicRoughness/baseColorTexture	material.mainTexture	shorthand of material.SetTexture("_MainTex", texture)

NormalMap

Occlusion

Emission

Alpha

Unity RenderType Tag	glTFのmaterial.alphaModeプロパティ
Opaque	OPAQUE (デフォルトなので出力は不要)
Transparent	BLEND
TransparentCutout	MASK

RequireMent

• doubleSided=true
• vertexColor

Shader selector for KHR_material_unlit

baseColorFactor	baseColorTexture	alpha mode	Unity shader
o		OPAQUE	Unlit/Color
	o	OPAQUE	Unlit/Texture
o	o	OPAQUE	require custom shader
o		BLEND	require custom shader
	o	BLEND	Unlit/Transparent
o	o	BLEND	require custom shader
o		CUTOUT	----
	o	CUTOUT	Unlit/Transparent Cutout
o	o	CUTOUT	require custom shader