init -999 python:
    if not hasattr(store, 'DukeGammaAdjust'):
        def DukeGammaAdjust(d): return d
    if not hasattr(store, 'DukeCustomShow'):
        def DukeCustomShow(*args, **kwargs): renpy.show(*args, **kwargs)
    try:
        renpy.register_shader("duke.gamma_correction", variables="", fragment_300="", fragment_130="")
    except:
        pass