Specular Highlight in the wrong place?

xytor · 2010-10-15T19:51:51

I am calculating my specular highlights in world space, in HLSL.There is an XZ plane and a light slightly above the plane.The problem is, the farther the light is from the origin of world space, the farther the highlight on the plane is from the light (and closer to the origin). (If the light moves right, the highlight also moves right but slower, so it is somewhere between the origin and the light).When the camera moves, although the highlights change shape, they stay in the same place.What could cause this problem?