Function noise_sampler_for 

pub(crate) fn noise_sampler_for(name: &str) -> &'static str

For a noise sampler name embedded in one of the 4 MD2 variants, pick the sampler binding. Plain sampler_noise_lq (no prefix) defaults to the point+wrap variant — that’s how MD2 samples noise pixel-by-pixel when the author wants the raw value.