30 PBR Material Presets — From Polished Steel to Frosted Glass
PBR (physically-based rendering) materials are powerful and finicky. Get the roughness and metalness off by 0.1 and your "polished steel" looks like wet plastic. To save you that problem, Yugma ships 30 named presets the AI can apply by reference.
# The full list
Metals
- Polished steel —
#c0c0c0, r0.15, m1.0 - Brushed steel —
#b0b0b0, r0.4, m1.0 - Mirror chrome —
#e8e8e8, r0.05, m1.0 - Gold —
#ffd700, r0.1, m1.0 - Brushed gold —
#d4ae3b, r0.35, m1.0 - Copper —
#b87333, r0.2, m1.0 - Brass —
#b5a642, r0.25, m1.0 - Aged brass —
#8c7d3a, r0.55, m1.0 - Rusted iron —
#5a3826, r0.85, m1.0
Stone & ceramic
- Marble (white veined) —
#ececec, r0.2, m0.0 - Granite —
#8c8c8c, r0.6, m0.0 - Concrete —
#808080, r0.9, m0.0 - Glazed ceramic —
#f0f0f0, r0.05, m0.0 - Terracotta —
#a35c3a, r0.7, m0.0
Wood
- Oak (light) —
#b88a52, r0.65, m0.0 - Walnut —
#5a3e2b, r0.7, m0.0 - Mahogany —
#4a2c1f, r0.6, m0.0 - Ebony —
#1c1614, r0.5, m0.0 - Whitewashed oak —
#d8c5a8, r0.7, m0.0
Glass
- Clear glass —
#aaddff, r0.0, m0.0, opacity0.3 - Frosted glass —
#e0e8ee, r0.5, m0.0, opacity0.6 - Smoked glass —
#202428, r0.05, m0.0, opacity0.45
Fabrics & soft
- Velvet (warm) —
#5d3a47, r0.95, m0.0 - Linen —
#d8cab1, r0.85, m0.0 - Leather (tan) —
#8a5a3b, r0.7, m0.0 - Suede —
#7c5a3e, r0.95, m0.0
Emissive
- Neon purple —
#000000, emissive#a78bfa, intensity3 - Neon green —
#000000, emissive#34d399, intensity3 - Warm filament —
#000000, emissive#ffb24a, intensity2.5 - Cool screen —
#000000, emissive#5a98ff, intensity1.8
# How the AI uses these
The AI Director knows every preset by name. "Switch the table to walnut" → Yugma calls apply_material_preset with presetName: "walnut". "Make the lamp glow neon purple" → emissive preset applied with intensity 3.
# Custom presets
Save any material in the studio to your library; the AI Director picks it up by the name you assigned. Useful when you have a brand-color material that needs to be reused across scenes.