diff --git a/source/build/include/polymost.h b/source/build/include/polymost.h
index b79345cd2..99db0cfd2 100644
--- a/source/build/include/polymost.h
+++ b/source/build/include/polymost.h
@@ -108,5 +108,6 @@ EDUKE32_STATIC_ASSERT(DAMETH_NARROW_MASKPROPS(DAMETH_MASKPROPS) == DAMETH_MASK);
 
 extern float fcosglobalang, fsinglobalang;
 extern float fxdim, fydim, fydimen, fviewingrange;
+extern int32_t viewingrangerecip;
 
 #endif
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index 05d3f78a5..618088285 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -1104,7 +1104,7 @@ static int32_t globaluclip, globaldclip;
 //char globparaceilclip, globparaflorclip;
 
 int32_t xyaspect;
-static int32_t viewingrangerecip;
+int32_t viewingrangerecip;
 
 static char globalxshift, globalyshift;
 static int32_t globalxpanning, globalypanning;
diff --git a/source/build/src/polymost.cpp b/source/build/src/polymost.cpp
index ac5638519..7ff3c180c 100644
--- a/source/build/src/polymost.cpp
+++ b/source/build/src/polymost.cpp
@@ -266,7 +266,7 @@ static void polymost_updaterotmat(void)
     };
     multiplyMatrix4f(matrix, tiltmatrix);
     renderSetViewMatrix(matrix);
-    renderSetVisibility(((float)(g_visibility) / r_ambientlight) * fviewingrange * (7.5f / (65536.f * 65536.f)));
+    renderSetVisibility(mulscale16(g_visibility, mulscale16(xdimenscale, viewingrangerecip)) * fviewingrange * (1.f / (65536.f * 65536.f)) / r_ambientlight);
 }
 
 static void polymost_flatskyrender(vec2f_t const* const dpxy, int32_t const n, int32_t method, const vec2_16_t& tilesiz);