Reduce sample to 4

data/shaders/bilateralH.comp

@@ -4,7 +4,7 @@ uniform sampler2D source;
 uniform sampler2D depth;
 uniform vec2 pixel;
 layout(r16f) volatile restrict writeonly uniform image2D dest;
-uniform float sigma = 1.5;
+uniform float sigma = 2.;
 
 layout (local_size_x = 4, local_size_y = 4) in;
 

data/shaders/bilateralH.frag

@@ -8,7 +8,7 @@ out vec4 FragColor;
 
 void main()
 {
-    float sigma = 1.5;
+    float sigma = 2.;
 
     vec2 uv = gl_FragCoord.xy * pixel;
     float X = uv.x;

data/shaders/bilateralV.comp

@@ -4,7 +4,7 @@ uniform sampler2D source;
 uniform sampler2D depth;
 uniform vec2 pixel;
 layout(r16f) volatile restrict writeonly uniform image2D dest;
-uniform float sigma = 1.5;
+uniform float sigma = 2.;
 
 layout (local_size_x = 4, local_size_y = 4) in;
 

data/shaders/bilateralV.frag

@@ -8,7 +8,7 @@ out vec4 FragColor;
 
 void main()
 {
-    float sigma = 1.5;
+    float sigma = 2.;
 
     vec2 uv = gl_FragCoord.xy * pixel;
     float X = uv.x;

data/shaders/ssao.frag

@@ -11,8 +11,8 @@ out float AO;
 const float bias = .0005;
 const float thickness = 10.0;
 
-#define SAMPLES 8
-const float invSamples = 0.125; // 1. / SAMPLES
+#define SAMPLES 4
+const float invSamples = 0.25; // 1. / SAMPLES
 
 vec3 getXcYcZc(int x, int y, float zC)
 {
@@ -60,7 +60,9 @@ void main(void)
         float h = r * alpha;
         vec2 localoffset = h * rotations;
 
-        ivec2 ioccluder_uv = clamp(ivec2(x, y) + ivec2(localoffset), ivec2(0), ivec2(u_screen));
+        ivec2 ioccluder_uv = ivec2(x, y) + ivec2(localoffset);
+
+        if (ioccluder_uv.x < 0 || ioccluder_uv.x > int(u_screen.x) || ioccluder_uv.y < 0 || ioccluder_uv.y > int(u_screen.y)) continue;
 
         float LinearoccluderFragmentDepth = textureLod(dtex, vec2(ioccluder_uv) / u_screen, max(m, 0.)).x;
         vec3 OccluderPos = getXcYcZc(ioccluder_uv.x, ioccluder_uv.y, LinearoccluderFragmentDepth);

src/tracks/track.cpp

@@ -542,7 +542,7 @@ void Track::loadTrackInfo()
     m_sun_diffuse_color     = video::SColor(255, 255, 255, 255);
     m_sun_position          = core::vector3df(0, 10, 10);
     irr_driver->setSSAORadius(0.5);
-    irr_driver->setSSAOK(2.0);
+    irr_driver->setSSAOK(3.);
     irr_driver->setSSAOSigma(1.);
     XMLNode *root           = file_manager->createXMLTree(m_filename);