Method SetAlphaToCoverage

engine/Poseidon/Graphics/Core/Engine.hpp:407–407

MSAA alpha-to-coverage on cutout (alpha-test) draws — grades sub-pixel cutout features (fence wire, foliage) across the MSAA samples instead of the hard per-fragment alpha test keeping or killing whole pixels. No-op on backends without MSAA.

    // samples instead of the hard per-fragment alpha test keeping or
    // killing whole pixels.  No-op on backends without MSAA.
    virtual void SetAlphaToCoverage(bool /*enable*/) {}
    virtual bool GetAlphaToCoverage() const { return false; }

    // Diagnostic: replace object shading with a flat solid colour (red), keeping