Function create_user_warp_bind_group 

fn create_user_warp_bind_group(
    device: &Device,
    layout: &BindGroupLayout,
    uniforms_buffer: &Buffer,
    prev_view: &TextureView,
    sampler: &Sampler,
    aux: &WarpAuxViews<'_>,
    sampler_fw: &Sampler,
    sampler_fc: &Sampler,
    sampler_pw: &Sampler,
    sampler_pc: &Sampler,
    user_textures: &[&TextureView; 8],
) -> BindGroup

Build the 25-entry bind group for the user warp pass.

prev_view is bound to everywhere the wrapper expects a “main” texture (1, 3, 4, 5, 23). Blur slots fall back to prev_view because the warp pass runs before this frame’s blur pipeline — a one-frame delayed blur pyramid would be more accurate but is deferred work.