Java Edition Resource Pack Shaders - Core Shader Custom Render Targets

The ability add custom render targets to Core shaders which can be used later in Post shaders would be very useful for resource pack shader developers in many cases.

For example, another render target could be created to render surface normal information to. (Think normal G buffers in deferred rendering).

The ability to add more render targets to Core shaders could prove to be a very powerful tool to help create more complex shaders for Minecraft.