Luxar Viewer API Documentation - v2026.10.19
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    Variable GSPLAT_PICK_VERTEX_SHADERConst

    GSPLAT_PICK_VERTEX_SHADER: string = ...

    Picking vertex shader for gsplats. Adds uNodeId/vNodeId/vElementId, strips colormap. Uses tighter truncation (1.5σ) for more precise picking.