Tree reference structure: Created README specifications for Oak (seasonal), Pine (evergreen), Palm (tropical), and Dead trees. Documented size standards, visual specs, and Style 32 requirements for each type.

references/trees/pine/README.md

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+# 🌲 Pine Tree References (Evergreen)
+
+**Tree Type:** Pine - Coniferous evergreen
+**Seasonal Changes:** NO (stays green, adds snow in winter)
+
+---
+
+## Required References:
+
+### **Master References Needed:**
+- `pine_default.png` - Standard green pine
+- `pine_winter.png` - Same tree with snow
+
+### **Size Standards:**
+- Small Pine: 96x96px
+- Medium Pine: 160x192px
+- Tall Pine: 192x256px (vertical)
+
+---
+
+## Visual Specifications:
+
+**Trunk:**
+- Color: `#8B4513` (Saddle Brown)
+- Style: Straight, vertical
+- Shape: Conical taper
+
+**Needles:**
+- Color: `#2E8B57` (Sea Green) - STAYS GREEN ALL YEAR
+- Style: Triangular tiers/layers
+- NOT individual needles - simplified clusters
+
+**Winter Addition:**
+- Snow accumulation on branches
+- Snow color: `#F0F8FF` (Alice Blue)
+- Heavier, snow-laden look
+
+---
+
+## Style Requirements:
+
+✅ **MUST HAVE:**
+- SMOOTH vector-style lines
+- THICK 5px black outlines `#000000`
+- Conical/triangular silhouette
+- Layered branch tiers
+- Transparent background
+
+❌ **NEVER:**
+- Pixelated
+- Realistic pine needles
+- Changing needle color (always green!)