diff --git a/polymer/eduke32/build/include/polymer.h b/polymer/eduke32/build/include/polymer.h
index b696a0c3f..6b68eac50 100644
--- a/polymer/eduke32/build/include/polymer.h
+++ b/polymer/eduke32/build/include/polymer.h
@@ -40,6 +40,7 @@ extern int32_t      pr_shadowfiltering;
 extern int32_t      pr_maxlightpasses;
 extern int32_t      pr_maxlightpriority;
 extern int32_t      pr_fov;
+extern float        pr_customaspect;
 extern int32_t      pr_billboardingmode;
 extern int32_t      pr_verbosity;
 extern int32_t      pr_wireframe;
diff --git a/polymer/eduke32/build/src/polymer.c b/polymer/eduke32/build/src/polymer.c
index 8d7302a5b..3b2c970fe 100644
--- a/polymer/eduke32/build/src/polymer.c
+++ b/polymer/eduke32/build/src/polymer.c
@@ -17,6 +17,7 @@ int32_t         pr_shadowfiltering = 1;
 int32_t         pr_maxlightpasses = 10;
 int32_t         pr_maxlightpriority = PR_MAXLIGHTPRIORITY;
 int32_t         pr_fov = 426;           // appears to be the classic setting.
+float           pr_customaspect = 0.0f;
 int32_t         pr_billboardingmode = 1;
 int32_t         pr_verbosity = 1;       // 0: silent, 1: errors and one-times, 2: multiple-times, 3: flood
 int32_t         pr_wireframe = 0;
@@ -664,6 +665,8 @@ void                polymer_uninit(void)
 
 void                polymer_glinit(void)
 {
+    float           aspect;
+
     bglClearColor(0.0f, 0.0f, 0.0f, 1.0f);
     bglClearStencil(0);
     bglClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
@@ -685,12 +688,15 @@ void                polymer_glinit(void)
     else
         bglPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
 
+    if (pr_customaspect != 0.0f)
+        aspect = pr_customaspect;
+    else
+        aspect = (float)(windowx2-windowx1+1) /
+                 (float)(windowy2-windowy1+1);
+
     bglMatrixMode(GL_PROJECTION);
     bglLoadIdentity();
-    bgluPerspective((float)(pr_fov) / (2048.0f / 360.0f),
-                    (float)(windowx2-windowx1+1) /
-                    (float)(windowy2-windowy1+1),
-                    0.01f, 100.0f);
+    bgluPerspective((float)(pr_fov) / (2048.0f / 360.0f), aspect, 0.01f, 100.0f);
 
     bglMatrixMode(GL_MODELVIEW);
     bglLoadIdentity();
diff --git a/polymer/eduke32/build/src/polymost.c b/polymer/eduke32/build/src/polymost.c
index 8f44dba9d..261bf2abd 100644
--- a/polymer/eduke32/build/src/polymost.c
+++ b/polymer/eduke32/build/src/polymost.c
@@ -5965,6 +5965,7 @@ void polymost_initosdfuncs(void)
         { "r_pr_maxlightpasses", "r_pr_maxlightpasses: the maximal amount of lights a single object can by affected by", (void*)&r_pr_maxlightpasses, CVAR_INT|CVAR_FUNCPTR, 0, 0, PR_MAXLIGHTS },
         { "r_pr_maxlightpriority", "r_pr_maxlightpriority: lowering that value removes less meaningful lights from the scene", (void*)&pr_maxlightpriority, CVAR_INT, 0, 0, PR_MAXLIGHTPRIORITY },
         { "r_pr_fov", "r_pr_fov: sets the field of vision in build angle", (void*)&pr_fov, CVAR_INT, 0, 0, 1023},
+        { "r_pr_customaspect", "r_pr_customaspect: if non-zero, forces the 3D view aspect ratio", (void*)&pr_customaspect, CVAR_FLOAT, 0, 0, 3 },
         { "r_pr_billboardingmode", "r_pr_billboardingmode: face sprite display method. 0: classic mode; 1: polymost mode", (void*)&pr_billboardingmode, CVAR_INT, 0, 0, 1 },
         { "r_pr_verbosity", "r_pr_verbosity: verbosity level of the polymer renderer", (void*)&pr_verbosity, CVAR_INT, 0, 0, 3 },
         { "r_pr_wireframe", "r_pr_wireframe: toggles wireframe mode", (void*)&pr_wireframe, CVAR_INT | CVAR_NOSAVE, 0, 0, 1 },