Putting Points and Lines into RegionPlot3D

*To*: mathgroup at smc.vnet.net*Subject*: [mg122541] Putting Points and Lines into RegionPlot3D*From*: Brentt <brenttnewman at gmail.com>*Date*: Mon, 31 Oct 2011 06:52:34 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

Hello, How can one put points and lines into a 3D plot? Here is my non-working code for having a unit sphere with a line inside of it going from the origin to 1 on the x-axis. origin = {0, 0, 0}; pBox = 1.5; RegionPlot3D[ x^2 + y^2 + z^2 <= 1, {x, -pBox, pBox}, {y, -pBox, pBox}, {z, -pBox, pBox}, PlotStyle -> Directive[Yellow, Opacity[0.2]], Mesh -> None, Epilog -> {Line[{origin, {0, 1, 0}}]}] Epilog seems to expect only 2D graphics object, which makes me think its not the right option to use. But what option would I use? Is there an available option? Plot3D has the same problem.