cleaner atmo model

git-svn-id: http://svn.code.sf.net/p/sauerbraten/code@6007 07af1644-1164-4067-b897-63bf4dc9b748

Author: eihrul

src/engine/rendersky.cpp

@@ -436,8 +436,6 @@ static void drawatmosphere(int w, float z1clip = 0.0f, float z2clip = 1.0f, int
     float planetradius = earthradius*atmoplanetsize, atmoradius = planetradius + earthatmoheight*atmoheight;
     LOCALPARAMF(atmoradius, planetradius, atmoradius*atmoradius, atmoradius*atmoradius - planetradius*planetradius);
 
-    LOCALPARAMF(sampleoffset, max(0.15f + 0.75f * sunlightdir.z, 0.0f));
-
     float gm = (1 - atmohaze)*0.2f + 0.75f;
     LOCALPARAMF(mie, 1 + gm*gm, -2*gm);