merge

9 files changed, 170 insertions, 267 deletions

diff --git a/indra/newview/app_settings/settings.xml b/indra/newview/app_settings/settings.xml
index 73f63458a3..f41f4b7382 100755
--- a/indra/newview/app_settings/settings.xml
+++ b/indra/newview/app_settings/settings.xml
@@ -7329,7 +7329,7 @@
     <string>Vector3</string>

     <key>Value</key>

     <array>

-      <real>0.40</real>

+      <real>0.80</real>

       <real>1.00</real>

       <real>0.00</real>

     </array>

@@ -7750,6 +7750,18 @@
     <key>Value</key>

     <real>0</real>

   </map>

+

+  <key>RenderDepthOfField</key>

+  <map>

+    <key>Comment</key>

+    <string>Whether to use depth of field effect when lighting and shadows are enabled</string>

+    <key>Persist</key>

+    <integer>1</integer>

+    <key>Type</key>

+    <string>Boolean</string>

+    <key>Value</key>

+    <integer>0</integer>

+  </map>

   

   <key>RenderSpotLightsInNondeferred</key>

   <map>

@@ -8086,7 +8098,7 @@
     <key>Type</key>

     <string>F32</string>

     <key>Value</key>

-    <real>0.1</real>

+    <real>0</real>

   </map>

 

   <key>RenderGIAmbiance</key>

@@ -8306,9 +8318,9 @@
       <string>Vector3</string>

       <key>Value</key>

       <array>

-        <real>0.299</real>

-        <real>0.587</real>

-        <real>0.114</real>

+        <real>1</real>

+        <real>0</real>

+        <real>0</real>

       </array>

     </map>

     <key>RenderGlowMaxExtractAlpha</key>

@@ -8320,7 +8332,7 @@
       <key>Type</key>

       <string>F32</string>

       <key>Value</key>

-      <real>0.065</real>

+      <real>0.25</real>

     </map>

     <key>RenderGlowMinLuminance</key>

     <map>

@@ -8331,7 +8343,7 @@
       <key>Type</key>

       <string>F32</string>

       <key>Value</key>

-      <real>2.5</real>

+      <real>9999</real>

     </map>

     <key>RenderGlowResolutionPow</key>

     <map>

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index b08c5dd295..28a38d4390 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -10,7 +10,6 @@
 #extension GL_ARB_texture_rectangle : enable
 
 uniform sampler2D diffuseMap;
-uniform sampler2D noiseMap;
 uniform sampler2DRect depthMap;
 
 uniform mat4 shadow_matrix[6];
@@ -45,8 +44,6 @@ void main()
 	vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
 	frag *= screen_res;
 	
-	vec3 samp_pos = getPosition(frag).xyz;
-	
 	vec4 pos = vec4(vary_position, 1.0);
 	
 	vec4 col = vec4(vary_ambient + vary_directional.rgb, gl_Color.a);
diff --git a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index ea2df4b51a..d9f021b114 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
@@ -39,44 +39,49 @@ vec4 getPosition(vec2 pos_screen)
 
 void main() 
 {
-	vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz;
+        vec2 tc = vary_fragcoord.xy;
+	vec3 norm = texture2DRect(normalMap, tc).xyz;
 	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
-	vec3 pos = getPosition(vary_fragcoord.xy).xyz;
-	vec4 ccol = texture2DRect(lightMap, vary_fragcoord.xy).rgba;
+	vec3 pos = getPosition(tc).xyz;
+	vec4 ccol = texture2DRect(lightMap, tc).rgba;
 	
 	vec2 dlt = kern_scale * delta / (1.0+norm.xy*norm.xy);
-	
 	dlt /= max(-pos.z*dist_factor, 1.0);
 	
 	vec2 defined_weight = kern[0].xy; // special case the first (centre) sample's weight in the blur; we have to sample it anyway so we get it for 'free'
 	vec4 col = defined_weight.xyxx * ccol;
-	
+
+	// relax tolerance according to distance to avoid speckling artifacts, as angles and distances are a lot more abrupt within a small screen area at larger distances
+	float pointplanedist_tolerance_pow2 = pos.z*pos.z*0.00005;
+
+	// perturb sampling origin slightly in screen-space to hide edge-ghosting artifacts where smoothing radius is quite large
+	tc += ( (mod(tc.x+tc.y,2) - 0.5) * kern[1].z * dlt * 0.5 );
+
 	for (int i = 1; i < 4; i++)
 	{
-		vec2 tc = vary_fragcoord.xy + kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
+		vec2 samptc = tc + kern[i].z*dlt;
+	        vec3 samppos = getPosition(samptc).xyz; 
 		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
+		if (d*d <= pointplanedist_tolerance_pow2)
 		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
+			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
 			defined_weight += kern[i].xy;
 		}
 	}
 	for (int i = 1; i < 4; i++)
 	{
-		vec2 tc = vary_fragcoord.xy - kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
+		vec2 samptc = tc - kern[i].z*dlt;
+	        vec3 samppos = getPosition(samptc).xyz; 
 		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
+		if (d*d <= pointplanedist_tolerance_pow2)
 		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
+			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
 			defined_weight += kern[i].xy;
 		}
 	}
 
-
-
 	col /= defined_weight.xyxx;
+	col.y *= col.y;
 	
 	gl_FragColor = col;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
index 7a6b40006b..f377685045 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
@@ -36,86 +36,97 @@ float getDepth(vec2 pos_screen)
 	return p.z/p.w;
 }
 
-void dofSample(inout vec4 diff, inout float w, float fd, float x, float y)
+float calc_cof(float depth)
+{
+	float sc = abs(depth-focal_distance)/-depth*blur_constant;
+		
+	sc /= magnification;
+	
+	// tan_pixel_angle = pixel_length/-depth;
+	float pixel_length =  tan_pixel_angle*-focal_distance;
+	
+	sc = sc/pixel_length;
+	sc *= 1.414;
+	
+	return sc;
+}
+
+void dofSampleNear(inout vec4 diff, inout float w, float cur_sc, vec2 tc)
 {
-	vec2 tc = vary_fragcoord.xy+vec2(x,y);
 	float d = getDepth(tc);
 	
+	float sc = calc_cof(d);
+	
 	float wg = 1.0;
-	//if (d < fd)
-	//{
-	//	diff += texture2DRect(diffuseRect, tc);
-	//	w = 1.0;
-	//}
-	if (d > fd)
-	{
-		wg = max(d/fd, 0.1);
-	}
+		
+	vec4 s = texture2DRect(diffuseRect, tc);
+	// de-weight dull areas to make highlights 'pop'
+	wg *= s.r+s.g+s.b;
+	
+	diff += wg*s;
 	
-	diff += texture2DRect(diffuseRect, tc+vec2(0.5,0.5))*wg*0.25;
-	diff += texture2DRect(diffuseRect, tc+vec2(-0.5,0.5))*wg*0.25;
-	diff += texture2DRect(diffuseRect, tc+vec2(0.5,-0.5))*wg*0.25;
-	diff += texture2DRect(diffuseRect, tc+vec2(-0.5,-0.5))*wg*0.25;
 	w += wg;
 }
 
-void dofSampleNear(inout vec4 diff, inout float w, float x, float y)
+void dofSample(inout vec4 diff, inout float w, float min_sc, float cur_depth, vec2 tc)
 {
-	vec2 tc = vary_fragcoord.xy+vec2(x,y);
+	float d = getDepth(tc);
+	
+	float sc = calc_cof(d);
+	
+	if (sc > min_sc //sampled pixel is more "out of focus" than current sample radius
+	   || d < cur_depth) //sampled pixel is further away than current pixel
+	{
+		float wg = 1.0;
 		
-	diff += texture2DRect(diffuseRect, tc);
-	w += 1.0;
+		vec4 s = texture2DRect(diffuseRect, tc);
+		// de-weight dull areas to make highlights 'pop'
+		wg *= s.r+s.g+s.b;
+	
+		diff += wg*s;
+		
+		w += wg;
+	}
 }
 
+
 void main() 
 {
 	vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz;
 	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
-	
-	
+		
 	vec2 tc = vary_fragcoord.xy;
 	
-	float sc = 0.75;
+	float depth = getDepth(tc);
 	
-	float depth;
-	depth = getDepth(tc);
-		
 	vec4 diff = texture2DRect(diffuseRect, vary_fragcoord.xy);
 	
-	{ //pixel is behind far focal plane
+	{ 
 		float w = 1.0;
 		
-		sc = (abs(depth-focal_distance)/-depth)*blur_constant;
-		
-		sc /= magnification;
-		
-		// tan_pixel_angle = pixel_length/-depth;
-		float pixel_length =  tan_pixel_angle*-focal_distance;
-		
-		sc = sc/pixel_length;
-		
-		//diff.r = sc;
-		
-		sc = min(abs(sc), 8.0);
-		
-		//sc = 4.0;
+		float sc = calc_cof(depth);
+		sc = min(abs(sc), 10.0);
 		
 		float fd = depth*0.5f;
 		
-		while (sc > 0.5)
+		float PI = 3.14159265358979323846264;
+
+		// sample quite uniformly spaced points within a circle, for a circular 'bokeh'		
+		//if (depth < focal_distance)
 		{
-			dofSample(diff,w, fd, sc,sc);
-			dofSample(diff,w, fd, -sc,sc);
-			dofSample(diff,w, fd, sc,-sc);
-			dofSample(diff,w, fd, -sc,-sc);
-			
-			sc -= 0.5;
-			float sc2 = sc*1.414;
-			dofSample(diff,w, fd, 0,sc2);
-			dofSample(diff,w, fd, 0,-sc2);
-			dofSample(diff,w, fd, -sc2,0);
-			dofSample(diff,w, fd, sc2,0);
-			sc -= 0.5;
+			while (sc > 0.5)
+			{
+				int its = int(max(1.0,(sc*3.7)));
+				for (int i=0; i<its; ++i)
+				{
+					float ang = sc+i*2*PI/its; // sc is added for rotary perturbance
+					float samp_x = sc*sin(ang);
+					float samp_y = sc*cos(ang);
+					// you could test sample coords against an interesting non-circular aperture shape here, if desired.
+					dofSample(diff, w, sc, depth, vary_fragcoord.xy + vec2(samp_x,samp_y));
+				}
+				sc -= 1.0;
+			}
 		}
 		
 		diff /= w;
@@ -123,5 +134,4 @@ void main()
 		
 	vec4 bloom = texture2D(bloomMap, vary_fragcoord.xy/screen_res);
 	gl_FragColor = diff + bloom;
-	
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
index 1e0693d19f..25ff958107 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
@@ -53,57 +53,49 @@ float calcAmbientOcclusion(vec4 pos, vec3 norm)
 {
 	float ret = 1.0;
 	
-	float dist = dot(pos.xyz,pos.xyz);
-	
-	if (dist < 64.0*64.0)
-	{
-		vec2 kern[8];
-		// exponentially (^2) distant occlusion samples spread around origin
-		kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
-		kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
-		kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
-		kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
-		kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
-		kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
-		kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
-		kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
+	vec2 kern[8];
+	// exponentially (^2) distant occlusion samples spread around origin
+	kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
+	kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
+	kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
+	kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
+	kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
+	kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
+	kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
+	kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
 
-		vec2 pos_screen = vary_fragcoord.xy;
-		vec3 pos_world = pos.xyz;
-		vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy;
+	vec2 pos_screen = vary_fragcoord.xy;
+	vec3 pos_world = pos.xyz;
+	vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy;
 		
-		float angle_hidden = 0.0;
-		int points = 0;
+	float angle_hidden = 0.0;
+	int points = 0;
 		
-		float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
+	float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
 		
-		// it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?)
-		for (int i = 0; i < 8; i++)
-		{
-			vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
-			vec3 samppos_world = getPosition(samppos_screen).xyz; 
+	// it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations unrolling?)
+	for (int i = 0; i < 8; i++)
+	{
+		vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
+		vec3 samppos_world = getPosition(samppos_screen).xyz; 
 			
-			vec3 diff = pos_world - samppos_world;
-			float dist2 = dot(diff, diff);
+		vec3 diff = pos_world - samppos_world;
+		float dist2 = dot(diff, diff);
 			
-			// assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
-			// --> solid angle shrinking by the square of distance
-			//radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
-			//(k should vary inversely with # of samples, but this is taken care of later)
+		// assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
+		// --> solid angle shrinking by the square of distance
+		//radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
+		//(k should vary inversely with # of samples, but this is taken care of later)
 			
-			//if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0)  // -0.05*norm to shift sample point back slightly for flat surfaces
-			//	angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional.  max of 1.0 (= ssao_factor_inv * ssao_factor)
-			angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv);
+		angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv);
 			
-			// 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
-			points = points + int(diff.z > -1.0);
-		}
+		// 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
+		points = points + int(diff.z > -1.0);
+	}
 		
-		angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
+	angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
 		
-		ret = (1.0 - (float(points != 0) * angle_hidden));
-		ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0);
-	}
+	ret = (1.0 - (float(points != 0) * angle_hidden));
 	
 	return min(ret, 1.0);
 }
diff --git a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
index 32aab152a3..1dd29bfc70 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
@@ -14,7 +14,6 @@ uniform sampler2DRectShadow shadowMap0;
 uniform sampler2DRectShadow shadowMap1;
 uniform sampler2DRectShadow shadowMap2;
 uniform sampler2DRectShadow shadowMap3;
-uniform sampler2D noiseMap;
 uniform sampler2DRect depthMap;
 
 uniform mat4 shadow_matrix[6];
@@ -70,8 +69,6 @@ void main()
 	vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
 	frag *= screen_res;
 	
-	vec3 samp_pos = getPosition(frag).xyz;
-	
 	float shadow = 1.0;
 	vec4 pos = vec4(vary_position, 1.0);
 	
diff --git a/indra/newview/app_settings/shaders/class2/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/blurLightF.glsl
deleted file mode 100644
index ea2df4b51a..0000000000
--- a/indra/newview/app_settings/shaders/class2/deferred/blurLightF.glsl
+++ /dev/null
@@ -1,83 +0,0 @@
-/** 
- * @file blurLightF.glsl
- *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
- * $/LicenseInfo$
- */
- 
-#version 120
-
-#extension GL_ARB_texture_rectangle : enable
-
-uniform sampler2DRect depthMap;
-uniform sampler2DRect normalMap;
-uniform sampler2DRect lightMap;
-
-uniform float dist_factor;
-uniform float blur_size;
-uniform vec2 delta;
-uniform vec3 kern[4];
-uniform float kern_scale;
-
-varying vec2 vary_fragcoord;
-
-uniform mat4 inv_proj;
-uniform vec2 screen_res;
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).a;
-	vec2 sc = pos_screen.xy*2.0;
-	sc /= screen_res;
-	sc -= vec2(1.0,1.0);
-	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
-	vec4 pos = inv_proj * ndc;
-	pos /= pos.w;
-	pos.w = 1.0;
-	return pos;
-}
-
-void main() 
-{
-	vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz;
-	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
-	vec3 pos = getPosition(vary_fragcoord.xy).xyz;
-	vec4 ccol = texture2DRect(lightMap, vary_fragcoord.xy).rgba;
-	
-	vec2 dlt = kern_scale * delta / (1.0+norm.xy*norm.xy);
-	
-	dlt /= max(-pos.z*dist_factor, 1.0);
-	
-	vec2 defined_weight = kern[0].xy; // special case the first (centre) sample's weight in the blur; we have to sample it anyway so we get it for 'free'
-	vec4 col = defined_weight.xyxx * ccol;
-	
-	for (int i = 1; i < 4; i++)
-	{
-		vec2 tc = vary_fragcoord.xy + kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
-		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
-		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-	for (int i = 1; i < 4; i++)
-	{
-		vec2 tc = vary_fragcoord.xy - kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
-		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
-		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-
-
-
-	col /= defined_weight.xyxx;
-	
-	gl_FragColor = col;
-}
-
diff --git a/indra/newview/app_settings/shaders/class2/deferred/blurLightV.glsl b/indra/newview/app_settings/shaders/class2/deferred/blurLightV.glsl
deleted file mode 100644
index c2d05c601a..0000000000
--- a/indra/newview/app_settings/shaders/class2/deferred/blurLightV.glsl
+++ /dev/null
@@ -1,19 +0,0 @@
-/** 
- * @file blurLightF.glsl
- *
- * $LicenseInfo:firstyear=2007&license=viewerlgpl$
- * $/LicenseInfo$
- */
- 
-#version 120
-
-varying vec2 vary_fragcoord;
-uniform vec2 screen_res;
-
-void main()
-{
-	//transform vertex
-	gl_Position = ftransform(); 
-	vec4 pos = gl_ModelViewProjectionMatrix * gl_Vertex;
-	vary_fragcoord = (pos.xy*0.5+0.5)*screen_res;
-}
diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
index cc921f23d7..08b16d787f 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
@@ -62,58 +62,50 @@ vec4 getPosition(vec2 pos_screen)
 float calcAmbientOcclusion(vec4 pos, vec3 norm)
 {
 	float ret = 1.0;
-	
-	float dist = dot(pos.xyz,pos.xyz);
-	
-	if (dist < 64.0*64.0)
-	{
-		vec2 kern[8];
-		// exponentially (^2) distant occlusion samples spread around origin
-		kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
-		kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
-		kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
-		kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
-		kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
-		kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
-		kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
-		kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
 
-		vec2 pos_screen = vary_fragcoord.xy;
-		vec3 pos_world = pos.xyz;
-		vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy;
+	vec2 kern[8];
+	// exponentially (^2) distant occlusion samples spread around origin
+	kern[0] = vec2(-1.0, 0.0) * 0.125*0.125;
+	kern[1] = vec2(1.0, 0.0) * 0.250*0.250;
+	kern[2] = vec2(0.0, 1.0) * 0.375*0.375;
+	kern[3] = vec2(0.0, -1.0) * 0.500*0.500;
+	kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625;
+	kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750;
+	kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875;
+	kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000;
+
+	vec2 pos_screen = vary_fragcoord.xy;
+	vec3 pos_world = pos.xyz;
+	vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy;
 		
-		float angle_hidden = 0.0;
-		int points = 0;
+	float angle_hidden = 0.0;
+	int points = 0;
 		
-		float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
+	float scale = min(ssao_radius / -pos_world.z, ssao_max_radius);
 		
-		// it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?)
-		for (int i = 0; i < 8; i++)
-		{
-			vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
-			vec3 samppos_world = getPosition(samppos_screen).xyz; 
+	// it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?)
+	for (int i = 0; i < 8; i++)
+	{
+		vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect);
+		vec3 samppos_world = getPosition(samppos_screen).xyz; 
 			
-			vec3 diff = pos_world - samppos_world;
-			float dist2 = dot(diff, diff);
+		vec3 diff = pos_world - samppos_world;
+		float dist2 = dot(diff, diff);
 			
-			// assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
-			// --> solid angle shrinking by the square of distance
-			//radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
-			//(k should vary inversely with # of samples, but this is taken care of later)
+		// assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area
+		// --> solid angle shrinking by the square of distance
+		//radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2
+		//(k should vary inversely with # of samples, but this is taken care of later)
 			
-			//if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0)  // -0.05*norm to shift sample point back slightly for flat surfaces
-			//	angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional.  max of 1.0 (= ssao_factor_inv * ssao_factor)
-			angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv);
+		angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv);
 			
-			// 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
-			points = points + int(diff.z > -1.0);
-		}
+		// 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" 
+		points = points + int(diff.z > -1.0);
+	}
 		
-		angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
+	angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0);
 		
-		ret = (1.0 - (float(points != 0) * angle_hidden));
-		ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0);
-	}
+	ret = (1.0 - (float(points != 0) * angle_hidden));
 	
 	return min(ret, 1.0);
 }