Texture Creation Guide

Purpose: Guide for creating mod textures using vanilla texture reuse and color transformation.

How it works: This skill is automatically activated when you mention tasks related to:

• Creating textures for custom blocks or items
• Reusing vanilla textures with color modifications
• Using ImageMagick for texture processing
• Creating wood variant textures (doors, trapdoors, etc.)

Simply describe what you want to do, and Claude will reference the appropriate guidance from this skill.

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Reusing Vanilla Textures with Color Transformation (2025-11-15)

Approach: For custom wood variants, extract vanilla textures and apply color transformation to maintain visual consistency while ensuring rapid texture creation.

Workflow:

1. Extract Vanilla Textures

• Locate Minecraft client JAR: ~/.gradle/caches/fabric-loom/minecraftMaven/net/minecraft/minecraft/1.21.1/minecraft-1.21.1.jar
• Extract textures using unzip:

  unzip -j minecraft-1.21.1.jar \
    "assets/minecraft/textures/block/jungle_door_top.png" \
    "assets/minecraft/textures/block/jungle_door_bottom.png" \
    "assets/minecraft/textures/block/jungle_trapdoor.png" \
    "assets/minecraft/textures/item/jungle_door.png"
  

• Use similar wood type as base (e.g., Jungle for yellowish woods, Oak for brown woods)

2. Determine Color Transformation Parameters

• Compare reference planks (e.g., Time Wood Planks vs Jungle Planks)
• Use ImageMagick histogram to analyze color distributions:

  magick time_wood_planks.png -format %c histogram:info:-
  magick jungle_planks.png -format %c histogram:info:-
  

• Calculate RGB channel multipliers by comparing dominant colors
• Example for Time Wood (yellowish-olive from brown):
  • Red: 0.95× (slight reduction)
  • Green: 1.17× (significant increase for yellow tone)
  • Blue: 0.85× (reduction for warmth)

3. Apply Color Transformation with ImageMagick

magick input.png \
  -channel R -evaluate multiply 0.95 +channel \
  -channel G -evaluate multiply 1.17 +channel \
  -channel B -evaluate multiply 0.85 +channel \
  output.png

4. Iterate Based on Visual Feedback

• Test textures in-game
• Adjust RGB multipliers if colors don't match:
  • Too green → reduce G multiplier, increase R/B
  • Too yellow → reduce G multiplier
  • Too dark/bright → adjust all channels proportionally

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Known Color Transformations

Time Wood (from Jungle): R×0.95, G×1.17, B×0.85 - produces yellowish-olive tone

• Applied to: Door, Trapdoor textures (T080v-T080aa)

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Benefits

• Rapid texture creation (batch processing with ImageMagick)
• Visual consistency across all variants
• Easy iteration and adjustment
• Reusable approach for future wood types

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Notes

• HSV color space transformations may not work well for fundamental color shifts (e.g., brown → yellow-green)
• RGB channel multiplication provides more control for cross-color transformations
• Always verify textures in-game before finalizing

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Last Updated: 2025-12-08 Maintained by: Chrono Dawn Development Team