If you need to tweak the data of the applied material, you can change the basecolor, normal or matellic. Basic changes, where you only change the materials of face 6 of the prim stool.
If you want to change the metallic_factor or the roughness_factor, you could use
// Default values: [ PRIM_GLTF_METALLIC_ROUGHNESS, integer face, string texture, vector repeats, vector offsets, float rotation_in_radians, float metallic_factor, float roughness_factor ]
// Instruction to add to your .config HUD
// Change only the metallic_factor
stool;pbr_metallic;6;95f969e0-dfca-a2ee-74a1-15b8efd7e661,NULL,NULL,NULL,0.1
// Change only the roughness_factor
stool;pbr_metallic;6;95f969e0-dfca-a2ee-74a1-15b8efd7e661,NULL,NULL,NULL,NULL,0.5
// Or change both, by combining the values
stool;pbr_metallic;6;95f969e0-dfca-a2ee-74a1-15b8efd7e661,NULL,NULL,NULL,0.1,0.5
// 0.1 is the metallic_factor, 0.5 is the roughness_factor
The emissive of a material can be changed as well, to do so:
stool;pbr_emissive;6;95f969e0-dfca-a2ee-74a1-15b8efd7e661,NULL,NULL,NULL,0.8
// The emissive value will be set to 0.8
Setting NULL as a value is telling the script to use the default value