MC_TEXTURE_FORMAT_LAB_PBR
Based on the current Resource Pack’s texture format (defined in texture.properties), one or more of the following macros may be defined:
MC_TEXTURE_FORMAT_LAB_PBR
MC_TEXTURE_FORMAT_LAB_PBR_1_3
MC_TEXTURE_FORMAT_LAB_PBR
will be defined if any version of the labPBR standard is declared by the Resource Packs. MC_TEXTURE_FORMAT_LAB_PBR_1_3
will only be defined if labPBR 1.3 is declared.