Increase the max distance of the displacement effect

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@14793 178a84e3-b1eb-0310-8ba1-8eac791a3b58

data/shaders/displace.frag

@@ -20,7 +20,7 @@ void main()
 	offset -= 1.0;
 
 	// Fade according to distance to cam
-	float fade = 1.0 - smoothstep(1.0, 40.0, camdist);
+	float fade = 1.0 - smoothstep(1.0, 100.0, camdist);
 
 	// Fade according to distance from the edges
 	vec2 edger = gl_TexCoord[1].xy;