Add Materials and Color

Materials-and-Color.md

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+# Materials and Color
+
+NETFISHING uses simple colors and readable material separation rather than realistic texture detail.
+
+## Recommended material approach
+
+For initial assets, use simple material slots.
+
+Examples:
+
+- `mat_grass_light`
+- `mat_grass_dark`
+- `mat_moss`
+- `mat_soil`
+- `mat_sand`
+- `mat_wood_light`
+- `mat_wood_dark`
+- `mat_stone_light`
+- `mat_stone_dark`
+- `mat_teal`
+- `mat_coral`
+- `mat_cream`
+
+## Material limits
+
+Suggested limits:
+
+- Small props: 1–4 materials
+- Medium props: 2–5 materials
+- Large structures: 2–6 materials
+
+Avoid placing dozens of material slots on a single small object.
+
+## Color priorities
+
+Environment colors should generally be calmer than:
+
+- Characters
+- Items
+- Interaction points
+- Signs
+- Bobbers
+- Important landmarks
+
+Use darker structural colors for:
+
+- Timber gaps
+- Building supports
+- Outlines
+- Deep water accents
+- Visual separation
+
+Use brighter accents sparingly.
+
+## Textures
+
+Do not create textures unless:
+
+- The issue requests them
+- The asset clearly benefits from them
+- The texture workflow has been approved
+
+Avoid:
+
+- Large 4K texture sets
+- Unique texture files for every small prop
+- Baked lighting
+- Complex PBR workflows
+- Blender-only procedural shaders
+- Unnecessary normal maps
+- Unnecessary transparency
+
+If a texture is required, use practical sizes appropriate to the asset.
+
+## Blender materials
+
+Use materials that transfer cleanly through GLB.
+
+Keep Blender shader nodes simple.
+
+A basic Principled BSDF with:
+
+- Base Color
+- Roughness
+- Limited metallic use
+
+is normally sufficient.
+
+Do not rely on unsupported procedural nodes.
+
+## Compatibility renderer
+
+All materials must be tested using Godot’s Compatibility renderer.
+
+Confirm:
+
+- Colors appear correctly
+- Transparency behaves correctly
+- Shading remains readable
+- Materials do not require Forward+ features
+- No texture references are missing