Built In Blocks Vertex Blocks Name Type Binding Description Position Vector 3 Object Space Position Defines the absolute object space vertex position per vertex. Normal Vector 3 Object Space Normal Defines the absolute object space vertex normal per vertex. Tangent Vector 3 Object Space Tangent Defines the absolute object space vertex tangent per vertex. Color Vector 4 Vertex Color Defines vertex color. Expected range 0 - 1. Fragment Blocks Name Type Binding Description Base Color Vector 3 None Defines material's base color value. Expected range 0 - 1. Normal (Tangent Space) Vector 3 Tangent Space Normal Defines material's normal value in tangent space. Normal (Object Space) Vector 3 Object Space Normal Defines material's normal value in object space. Normal (World Space) Vector 3 World Space Normal Defines material's normal value in world space. Emission Vector 3 None Defines material's emission color value. Expects positive values. Metallic Float None Defines material's metallic value, where 0 is non-metallic and 1 is metallic. Specular Vector 3 None Defines material's specular color value. Expected range 0 - 1. Smoothness Float None Defines material's smoothness value. Expected range 0 - 1. Ambient Occlusion Float None Defines material's ambient occlusion value. Expected range 0 - 1. Alpha Float None Defines material's alpha value. Used for transparency and/or alpha clip. Expected range 0 - 1. Alpha Clip Threshold Float None Fragments with an alpha below this value are discarded. Expected range 0 - 1.