Function translate_shader_with_plan 

pub fn translate_shader_with_plan(
    hlsl: &str,
    plan: &TextureBindingPlan,
) -> Result<String>

Same as translate_shader, but routes unrecognised tex2D sampler names through the supplied TextureBindingPlan. Preset authors reference disk-loaded textures via sampler sampler_<NAME>; + tex2D(sampler_<NAME>, uv); the renderer scans the HLSL, builds a plan that resolves each name to a slot in the comp pipeline’s user-texture binding array, and threads it through here so the emitted WGSL points at the right binding.

Empty plan ≡ legacy behaviour: unrecognised samplers fall back to sampler_main with a /*was: <name>*/ debug comment.