diff --git a/src/r_plane.cpp b/src/r_plane.cpp
index 4e18815ba..cbe1a358f 100644
--- a/src/r_plane.cpp
+++ b/src/r_plane.cpp
@@ -64,6 +64,8 @@
 #pragma warning(disable:4244)
 #endif
 
+CVAR(Bool, r_capsky, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG);
+
 //EXTERN_CVAR (Int, tx)
 //EXTERN_CVAR (Int, ty)
 
@@ -985,25 +987,20 @@ static const BYTE *R_GetTwoSkyColumns (FTexture *fronttex, int x)
 	}
 }
 
-static void R_DrawSkyColumn(int start_x, int y1, int y2, int columns)
+static void R_DrawSkyColumnStripe(int start_x, int y1, int y2, int columns, double scale, double texturemid, double yrepeat)
 {
 	uint32_t height = frontskytex->GetHeight();
 
 	for (int i = 0; i < columns; i++)
 	{
+		double uv_stepd = skyiscale * yrepeat;
+		double v = (texturemid + uv_stepd * (y1 - CenterY + 0.5)) / height + 1.0f;
+		double v_step = uv_stepd / height;
+
+		uint32_t uv_pos = (uint32_t)(v * 0x01000000);
+		uint32_t uv_step = (uint32_t)(v_step * 0x01000000);
+
 		int x = start_x + i;
-
-		int uv_fracbits = 24 - frontskytex->HeightBits;
-		double uv_stepd = skyiscale * frontskytex->Scale.Y;
-		double v = (skymid * frontskytex->Scale.Y + uv_stepd * (y1 - CenterY + 0.5)) / height;
-		v = v + 1.0f;
-		v *= height;
-		v *= (1 << uv_fracbits);
-		uint32_t uv_pos = (uint32_t)v;
-		uint32_t uv_step = xs_ToFixed(uv_fracbits, uv_stepd);
-		if (uv_step == 0) // To prevent divide by zero elsewhere
-			uv_step = 1;
-
 		if (MirrorFlags & RF_XFLIP)
 			x = (viewwidth - x);
 
@@ -1023,7 +1020,6 @@ static void R_DrawSkyColumn(int start_x, int y1, int y2, int columns)
 
 		bufplce[i] = (const BYTE *)frontskytex->GetColumnBgra(angle1, nullptr);
 		bufplce2[i] = backskytex ? (const BYTE *)backskytex->GetColumnBgra(angle2, nullptr) : nullptr;
-		buftexturefracx[i] = 0;
 		vince[i] = uv_step;
 		vplce[i] = uv_pos;
 	}
@@ -1048,18 +1044,30 @@ static void R_DrawSkyColumn(int start_x, int y1, int y2, int columns)
 			R_DrawDoubleSkyCol1(solid_top, solid_bottom);
 }
 
-static void R_DrawTruecolorSky(visplane_t *pl)
+static void R_DrawSkyColumn(int start_x, int y1, int y2, int columns)
 {
-	R_SetColorMapLight(fixedcolormap, 0, 0);
-	palookupoffse[0] = dc_colormap;
-	palookupoffse[1] = dc_colormap;
-	palookupoffse[2] = dc_colormap;
-	palookupoffse[3] = dc_colormap;
-	palookuplight[0] = 0;
-	palookuplight[1] = 0;
-	palookuplight[2] = 0;
-	palookuplight[3] = 0;
-	setupvline(FRACBITS);
+	if (1 << frontskytex->HeightBits == frontskytex->GetHeight())
+	{
+		double texturemid = skymid * frontskytex->Scale.Y;
+		R_DrawSkyColumnStripe(start_x, y1, y2, columns, frontskytex->Scale.Y, texturemid, frontskytex->Scale.Y);
+	}
+	else
+	{
+		double yrepeat = frontskytex->Scale.Y;
+		double scale = frontskytex->Scale.Y * skyscale;
+		double iscale = 1 / scale;
+		short drawheight = short(frontskytex->GetHeight() * scale);
+		double topfrac = fmod(skymid + iscale * (1 - CenterY), frontskytex->GetHeight());
+		if (topfrac < 0) topfrac += frontskytex->GetHeight();
+		double texturemid = topfrac - iscale * (1 - CenterY);
+		R_DrawSkyColumnStripe(start_x, y1, y2, columns, scale, texturemid, yrepeat);
+	}
+}
+
+static void R_DrawCapSky(visplane_t *pl)
+{
+	if (!r_swtruecolor)
+		R_SetColorMapLight(fixedcolormap, 0, 0);
 
 	int x1 = pl->left;
 	int x2 = pl->right;
@@ -1104,7 +1112,6 @@ static void R_DrawTruecolorSky(visplane_t *pl)
 			if (y2[i] <= y1[i])
 				empty_column_in_set = true;
 		}
-
 		if (empty_column_in_set || middle_y2 <= middle_y1)
 		{
 			for (int i = 0; i < 4; i++)
@@ -1149,9 +1156,9 @@ static void R_DrawTruecolorSky(visplane_t *pl)
 
 static void R_DrawSky (visplane_t *pl)
 {
-	if (r_swtruecolor)
+	if (r_swtruecolor && r_capsky)
 	{
-		R_DrawTruecolorSky(pl);
+		R_DrawCapSky(pl);
 		return;
 	}