Vulkan PostFX

Vulkan PostFX is a client-side layer for applying screen effects on Minecraft's newer Vulkan renderer. It reads external VPFX shader packs distributed as ZIP archives, which may contain effects such as tone mapping, highlight compression, depth-based effects and early shadow-depth adjustments. Shader references follow a fixed format and are limited to a fixed post directory layout.

The loader works in stages: each external ZIP is turned into a runtime resource pack during the startup resource reload and injected into the client's resource system. Packs are rewritten into separate runtime namespaces, which keeps them from clashing with the game's built-in assets and with other packs. Post-chains are loaded through Minecraft's ShaderManager and executed by the current postchain backend, with scene color available for sampling.

The mod is marked experimental, and its stated goal is a reliable VPFX workflow on the Vulkan path, with more capable shader runtime support added over time. It is not described as a full replacement for Iris or OptiFine. Files are published for Fabric only, for Minecraft 26.2, and the project includes an official minimal example pack named VPFX Minimal Showcase. The mod runs on the client alone, so players join servers without installing it.