Constant FIXTURE 

pub const FIXTURE: &str = "[materials.plain]\nbase = [0.5, 0.5, 0.5]\nroughness = 0.6\n\n[materials.grey]\nbase = [0.18, 0.18, 0.18]\nroughness = 0.7\n\n[materials.metal]\nfamily = \"metal\"\nbase = [0.91, 0.92, 0.92]\nroughness = 0.3\nmetalness = 1.0\n\n[materials.chrome]\nfamily = \"chrome\"\nbase = [0.95, 0.95, 0.95]\nroughness = 0.05\nmetalness = 1.0\n\n[materials.glass]\nfamily = \"glass\"\nbase = [1.0, 1.0, 1.0]\nroughness = 0.02\ntransmission = 1.0\nior = 1.5\nthickness = 0.01\n\n[materials.water]\nfamily = \"liquid\"\nbase = [1.0, 1.0, 1.0]\nroughness = 0.01\ntransmission = 1.0\nior = 1.333\nabsorption = 0.2\n\n[materials.lacquer]\nfamily = \"lacquer\"\nbase = [0.2, 0.35, 0.6]\nroughness = 0.4\nclearcoat = 1.0\nclearcoat_roughness = 0.05\n\n[materials.card]\nbase = [0.8, 0.8, 0.78]\nroughness = 0.85\nsheen = 0.1\n\n[materials.wood]\nfamily = \"wood\"\nbase = [0.45, 0.3, 0.18]\nroughness = 0.55\n\n[[materials.wood.layers]]\nkind = \"fbm\"\nfrequency = 8.0\namplitude = 0.3\nseed = 1\n\n[materials.felt]\nfamily = \"cloth\"\nbase = [0.2, 0.4, 0.25]\nroughness = 0.95\nsheen = 0.6\n\n[[materials.felt.layers]]\nkind = \"value\"\nfrequency = 400.0\namplitude = 0.5\nseed = 2\n\n[materials.lamp]\nfamily = \"emissive\"\nbase = [0.0, 0.0, 0.0]\nroughness = 1.0\nemission = [4.0, 3.6, 3.0]\n";