ArcScene error; fail to overlap and displays vertically

[FatemehMasouleh]

I�??m trying to add two layers in ArcSence- one a 3d point feature and the other one a 3d raster created from points using the Spline tool.  They not only fail to overlap but also the point layer (with MZ point shapes) displays vertically when I zoom. I�??ve tried the Base Heights with small elevation values. I�??ve also tried geographic and projected coordinate systems. Even with same CS they still don�??t overlap. I don�??t know what I�??m missing. Do I need to set a vertical coordinate system? If so, for which layer? Any advice? Thanks!

[JeffreySwain]

I would definitely use the projected coordinate system, preferably with the same units for the horizontal and vertical.  I would also recommend looking at the vertical exaggeration set for the scene.  I have seen what you are seeing, but it happened with a geographic coordinate system and it was extremely exaggerated.