How to control these macro definitions in the shader?

[dugufly]

If I use UbershaderLoader, how to control these macro definitions in the shader: HAS_ATTRIBUTE_TANGENTS， HAS_ ATTRIBUTE_ TANGENTS， MATERIAL_HAS_SHEEN_COLOR, IBL_INTEGRATION？

[romainguy]

You don't control those directly, they are inferred from what you do in your material. For instance if you specify a material.sheenColor, MATERIAL_HAS_SHEEN_COLOR` will be set. Those are implementation details you don't need to worry about. Everything public is documented in https://google.github.io/filament/Materials.html

[dugufly]

Where is this correspondence implemented？

“For instance if you specify a material.sheenColor, MATERIAL_HAS_SHEEN_COLOR` will be set”