diff --git a/config.cpp b/config.cpp
index bdc0df26..a3079dbc 100644
--- a/config.cpp
+++ b/config.cpp
@@ -2083,6 +2083,9 @@ EX void show_color_dialog() {
 
   dialog::addColorItem(XLAT("background"), backcolor << 8, 'b');
   dialog::add_action([] () { dialog::openColorDialog(backcolor); dialog::colorAlpha = false; dialog::dialogflags |= sm::SIDE; });
+  
+  if(WDIM == 2 && GDIM == 3 && hyperbolic)
+    dialog::addBoolItem_action(XLAT("cool fog effect"), context_fog, 'B');
 
   dialog::addColorItem(XLAT("foreground"), forecolor << 8, 'f');
   dialog::add_action([] () { dialog::openColorDialog(forecolor); dialog::colorAlpha = false; dialog::dialogflags |= sm::SIDE; });
diff --git a/shaders.cpp b/shaders.cpp
index 018217d2..c1ed9b56 100644
--- a/shaders.cpp
+++ b/shaders.cpp
@@ -269,7 +269,7 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
   if(!skip_t) {
     vmain += "mediump vec4 t = uMV * aPosition;\n";
     vmain += coordinator;
-    if(GDIM == 3 && WDIM == 2) {
+    if(GDIM == 3 && WDIM == 2 && hyperbolic && context_fog) {
       vsh += 
         "uniform mediump mat4 uRadarTransform;\n"
         "uniform mediump sampler2D tAirMap;\n"
@@ -362,6 +362,7 @@ void display_data::set_projection(int ed, ld shift) {
   if(sol && solv_all) id |= 1;
   if(in_h2xe()) id |= 1;
   if(in_s2xe()) id |= 2;
+  if(WDIM == 2 && GDIM == 3 && hyperbolic && context_fog) id |= 1;
   shared_ptr<glhr::GLprogram> selected;
 
   if(matched_programs.count(id)) selected = matched_programs[id];
diff --git a/sky.cpp b/sky.cpp
index c8b23ea6..71c80c12 100644
--- a/sky.cpp
+++ b/sky.cpp
@@ -2,6 +2,8 @@
 
 namespace hr {
 
+EX bool context_fog = true;
+
 EX ld camera_level;
 #if MAXMDIM >= 4 && CAP_GL