Intra-binary shock geometry dependence on the principal wind parameters. Left: companion wind momentum increases from top to bottom, and velocity decreases from left to right. The intra-binary shock is color-coded by the fraction of the shocked power hitting the companion surface and the companion is color-coded by the local heating power. Right: corresponding BVR light curves for ﹩i=70^\circ ﹩. The center panel shows the curves for a ﹩\beta =0.3﹩, f_v = 1.0, normalized to the R maximum. The surrounding panels show light curve changes from this case.