diff --git a/shaders.cpp b/shaders.cpp
index 21e64ee5..3b1c261e 100644
--- a/shaders.cpp
+++ b/shaders.cpp
@@ -180,7 +180,7 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
         break;
       }      
     }
-  else if(geometry == gProduct) {
+  else if(geometry == gProduct && !hybrid::over_sphere()) {
     shader_flags |= SF_PERS3 | SF_DIRECT;
     coordinator +=      
       "float z = log(t[2] * t[2] - t[0] * t[0] - t[1] * t[1]) / 2.;\n"
@@ -190,6 +190,11 @@ shared_ptr<glhr::GLprogram> write_shader(flagtype shader_flags) {
       "if(r != 0.) r = d / r;\n"
       "t.xy *= r; t.z = z;\n";
     distfun = "sqrt(z*z+d*d)";
+    treset = true;
+    }
+  else if(geometry == gProduct && hybrid::over_sphere()) {
+    shader_flags |= SF_PERS3 | SF_DIRECT;
+    distfun = "length(t.xyz)", treset = true;
     }
   else if(pmodel == mdPerspective) {
     shader_flags |= SF_PERS3 | SF_DIRECT;