export const assign_marker_varying = `
#if defined(dNeedsMarker)
#if defined(dMarkerType_instance)
vMarker = readFromTexture(tMarker, aInstance, uMarkerTexDim).a;
#elif defined(dMarkerType_groupInstance)
vMarker = readFromTexture(tMarker, aInstance * float(uGroupCount) + group, uMarkerTexDim).a;
#endif
#endif
`;