256 Block Tall Nether
The mods present in the screenshot are BetterNether & Biomes O' Plenty, and the shaderpack used is Complementary Reimagined.
BetterNether + Journey Into The Light + Nethercraft
All these mods wouldn't normally be compatible, but are through Nether API! The shaderpack used in the screenshot is Complementary Reimagined
Patched Nether Caves
Can now carve through biome top/filler blocks, as well as soul sand! The biomes in the screenshot are from Biomes O' Plenty and NetherEx
Stygian End
Stygian End biome generation with Nether API (notice the trees in the background look different than normal, and only the vanilla biome has chorus plants). The shaderpack used is Complementary Reimagined
Arctic Abyss With Customized Fog
A screenshot of NetherEx's Arctic Abyss biome with a custom fog color (set by this mod's `NetherAPIFogColorEvent.Nether` event via GroovyScript). The shaderpack used is Complementary Reimagined
Ruthless Sands With Customized Fog
A screenshot of NetherEx's Ruthless Sands biome with a custom fog color (set by this mod's `NetherAPIFogColorEvent.Nether` event via GroovyScript). The shaderpack used is Complementary Reimagined
Journey Into The Light using real biomes
Journey Into The Light uses a pseudo-biome system, this mod removes that and replaces it with real biomes!
BetterNether Using Real Biomes
BetterNether uses a pseudo-biome system, this mod removes that and replaces it with real biomes!
Nether Biomes Working Together
The biomes in the screenshot are from BetterNether, Biomes O' Plenty, and NetherEx
Connected Cave Near Village
A cave leading to a village structure from NetherEx
Corrupted Sands Cave
Biome is from Biomes O' Plenty