We present gamma-ray burst afterglow light curves in X-ray, optical and rad
io bands for various distributions of accelerated electrons behind the shoc
k. The effects of lateral expansion of the jet and of winds in typical Wolf
-Rayet star on the evolution are discussed. The light curves in the radiati
ve case decline more rapidly than those in the adiabatic case. Under the co
mbined effect of jet expansion and wind environment, the light curves have
the greatest deviation from those of the standard model. All these results
refer to the relativistic phase.