# TrueLightFX v5.1.2 - Compatibility & Color Hotfix
## Fixes for Compatibility of Older Game Versions
- Fixed a shader compilation crash (`endCol undeclared`) on older Iris and OptiFine versions by converting relative include paths to absolute paths and ensuring End color variables are declared globally.
- Fixed a pipeline crash (`Non [a-z0-9/._-] character in path`) on older Iris versions by converting uppercase Prismarine block IDs to lowercase in `block.properties`.
- Restored original End dimension color parameters (`END_R`, `END_G`, `END_B`, `END_I`) in `settings.glsl` to bring back the intended blue-violet look instead of red.
Developer information
Projects on Modrinth are automatically available through a Maven repository for use with JVM build tools such as Gradle.
maven { name = "Modrinth"; url = "https://api.modrinth.com/maven" }
