pub(crate) fn blend_state_for(additive: bool) -> BlendStateExpand description
Standard MD2-style blend state for an overlay pipeline.
additive = false→ straight alpha blending (preset opacity composes over the warp output).additive = true→ MD2’s additive mode wheresrc.rgb * src.alphais added on top of the destination. Used byb_additive_waves,b_additive(custom waves), and the additive variant of the custom-shape pipeline.