Beta quality-- Here there be Dragons!  The end goal is a complete rendering overhaul of 1.7.10 only using more modern and optimized GL usage, improved FPS and modern shader support.

Notes: 

• Some mods require updates, as found at http://github.com/GTNewHorizons, in order to properly take advantaged of the multi threaded rendering and/or avoid crashes.

Includes:

• (Unofficial) Backported Sodium/Embeddium [Multi threaded meshed chunk assembly]
• Various graphical enhancements from ArchaicFix
• Culling and rendering improvements from NotFine
• A fully functioning GLStateManager
• HUD Caching [Limits HUD rendering to 20fps]
• Batched Font Renderer
• Shaders - (Unofficial) Backported Iris/Oculus - Beta - Complementary & BSL mostly function, Sildurs, Seus, and others probably don't work

Coming Soon ™️

• MCPatcher[Forge] - Connected textures and resource pack improvements, etc

Required Dependencies

• UniMixins >= 0.1.14
• GTNHLib >= 0.6.6
• NOTE: Some mods are not required, but a specific version is required if present - see: Permanent Incompatibilities below.

Known (temporary) Incompatibilities

• Forge Relocation - Currently non Thread Safe; safe if not in use
• ProjectRed Frames - Currently non Thread Safe; safe if not in use

Known - Incompatibilities

• FalseTweaks - Not currently planned (Looking for volunteers)
• SmoothFont - Not currently planned (Looking for volunteers)
• RPLE - Not currently planned (Looking for volunteers)

Potential Incompatibilities

• EndlessIDs - Compat commits have been made, might work, might not - not fully tested

Permanent Incompatibilities

• Optifine [Disabled, won't fix]
• Fastcraft [Disable, won't fix]
• BetterFPS [Disable, Won't fix]
• OptimizationsAndTweaks [Disabled, won't fix]
• LWJGL3ify 1.5.4 and below - Use the latest version available, 1.5.7+
• ArchaicFix 0.6.2 and below - Use 0.7.0 or above
• Hodgepodge 2.4.3 and below - Use 2.4.4 or above
• CodeChickenCore/Lib <1.2.0 - Threading issues, use 1.2.0+
• Neodymium - Untested, but unlikely to be compatible. (Chunk Meshing is definitely incompatible, other features might work depending on config)