  We present our latest 3D model atmospheres for carbon-enhanced metal-poor
(CEMP) stars computed with the CO5BOLD code. The stellar parameters are
representative of hot turn-off objects (Teff ~ 6250 K, log g=4.0, [Fe/H]=-3.0).
The main purpose of these models is to investigate the role of 3D effects on
synthetic spectra of the CH G-band (4140-4400 A), the CN BX-band (3870-3890 A),
and several UV OH transitions (3122-3128 A). By comparison with the synthetic
spectra from standard 1D model atmospheres (assuming local thermodynamic
equilibrium, LTE), we derive 3D abundance corrections for carbon and oxygen of
up to -0.5 and -0.7 dex, respectively.
