diff --git a/source/core/rendering/render.cpp b/source/core/rendering/render.cpp
index f5795d1b6..f23437e54 100644
--- a/source/core/rendering/render.cpp
+++ b/source/core/rendering/render.cpp
@@ -108,8 +108,6 @@ struct FBunch
     angle_t endangle;
 };
 
-const float aspect_factor = (1.28f / 1.333333f);   // this factor gets applied by the original code - must check if needed or just an artifact of the weird math.
-
 // ----------------------------------------------------------------------------
 //
 // Bunches are groups of continuous lines
@@ -617,8 +615,6 @@ static void SetProjection(const FRotator& rotation, FAngle fov)
     {
         fovratio = ratio;
     }
-    ratio *= aspect_factor;   // this factor gets applied by the original code - must check if needed or just an artifact of the weird math.
-    fovratio *= aspect_factor;
     auto rotmat = eye.GetProjection(fov.Degrees, ratio, fovratio);
     renderSetProjectionMatrix(rotmat.get());
 }
@@ -626,7 +622,7 @@ static void SetProjection(const FRotator& rotation, FAngle fov)
 static void SetViewMatrix(const FRotator& angles, float vx, float vy, float vz, bool mirror, bool planemirror)
 {
     float mult = mirror ? -1.f : 1.f;
-    float planemult = planemirror ? -aspect_factor : aspect_factor;// Level->info->pixelstretch : Level->info->pixelstretch;
+    float planemult = planemirror ? -1.f : 1.f;// Level->info->pixelstretch : Level->info->pixelstretch;
     VSMatrix mViewMatrix;
 
     mViewMatrix.loadIdentity();
diff --git a/source/core/rendering/scene/hw_walls.cpp b/source/core/rendering/scene/hw_walls.cpp
index 98e4fc4be..74fe83c7f 100644
--- a/source/core/rendering/scene/hw_walls.cpp
+++ b/source/core/rendering/scene/hw_walls.cpp
@@ -784,7 +784,7 @@ void HWWall::DoTexture(HWDrawInfo* di, walltype* wal, walltype* refwall, float r
 	auto setv = [=](float hl, float hr, float frac) -> float
 	{
 		float h = hl + (hr - hl) * frac;
-		h = ((float)(refheight - (h * 256)) / ((th * 2048.0f) / (float)(wal->yrepeat))) + ypanning;
+		h = (-(float)(refheight + (h * 256)) / ((th * 2048.0f) / (float)(wal->yrepeat))) + ypanning;
 		if (wal->cstat & CSTAT_WALL_YFLIP) h = 1.f - h;
 		return h;
 	};