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)

Metallic Roughness & Occlusion

• Incompatible texture format

✅ Import

        // gltf to unity
        static Color32 ConvertMetallicRoughnessOcclusion(Color32 src)
        {
            return new Color32
            {
                r = src.b, // metallic
                g = src.r, // occlusion
                b = 0,
                a = (byte)(255 - src.g), // smoothness
            };
        }

[ ] Export

NormalMap

✅ Import

✅ Export

• Unpack DXT5 Texture

Emission

✅ Import

[ ] Export

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

[ ] Import

✅ Export

[ ] DoubleSided=true

Require custom shader

[ ] VertexColor

Require custom shader