diff --git a/src/gl/system/gl_swframebuffer.cpp b/src/gl/system/gl_swframebuffer.cpp
index a0fc6e716..c721af665 100644
--- a/src/gl/system/gl_swframebuffer.cpp
+++ b/src/gl/system/gl_swframebuffer.cpp
@@ -1076,7 +1076,7 @@ void OpenGLSWFrameBuffer::CalcFullscreenCoords(FBVERTEX verts[4], bool viewarea_
 
 int OpenGLSWFrameBuffer::GetPageCount()
 {
-	return 1;
+	return 2;
 }
 
 //==========================================================================
diff --git a/src/p_maputl.cpp b/src/p_maputl.cpp
index 76e06c640..19ea1db36 100644
--- a/src/p_maputl.cpp
+++ b/src/p_maputl.cpp
@@ -955,7 +955,7 @@ DEFINE_ACTION_FUNCTION(DBlockLinesIterator, CreateFromPos)
 	ACTION_RETURN_OBJECT(new DBlockLinesIterator(x, y, z, h, radius, sec));
 }
 
-DEFINE_ACTION_FUNCTION(DBlockThingsIterator, Next)
+DEFINE_ACTION_FUNCTION(DBlockLinesIterator, Next)
 {
 	PARAM_SELF_PROLOGUE(DBlockLinesIterator);
 	ACTION_RETURN_BOOL(self->Next());
@@ -1294,9 +1294,9 @@ DEFINE_ACTION_FUNCTION(DBlockThingsIterator, CreateFromPos)
 	ACTION_RETURN_OBJECT(new DBlockThingsIterator(x, y, z, h, radius, ignore, nullptr));
 }
 
-DEFINE_ACTION_FUNCTION(DBlockLinesIterator, Next)
+DEFINE_ACTION_FUNCTION(DBlockThingsIterator, Next)
 {
-	PARAM_SELF_PROLOGUE(DBlockLinesIterator);
+	PARAM_SELF_PROLOGUE(DBlockThingsIterator);
 	ACTION_RETURN_BOOL(self->Next());
 }
 
diff --git a/src/p_sight.cpp b/src/p_sight.cpp
index 68bf2ed3d..92cd52b95 100644
--- a/src/p_sight.cpp
+++ b/src/p_sight.cpp
@@ -735,7 +735,7 @@ bool SightCheck::P_SightPathTraverse ()
 // step through map blocks
 // Count is present to prevent a round off error from skipping the break
 
-	int itres;
+	int itres = -1;
 	for (count = 0 ; count < 1000 ; count++)
 	{
 		// end traversing when reaching the end of the blockmap
diff --git a/src/swrenderer/plane/r_flatplane.cpp b/src/swrenderer/plane/r_flatplane.cpp
index b3c695c78..c7cadfbab 100644
--- a/src/swrenderer/plane/r_flatplane.cpp
+++ b/src/swrenderer/plane/r_flatplane.cpp
@@ -69,7 +69,7 @@ namespace swrenderer
 		{
 			double cosine = cos(planeang), sine = sin(planeang);
 			pviewx = pl->xform.xOffs + ViewPos.X * cosine - ViewPos.Y * sine;
-			pviewy = pl->xform.yOffs - ViewPos.X * sine - ViewPos.Y * cosine;
+			pviewy = pl->xform.yOffs + pl->xform.baseyOffs - ViewPos.X * sine - ViewPos.Y * cosine;
 		}
 		else
 		{
@@ -209,19 +209,27 @@ namespace swrenderer
 			drawerargs.dc_viewpos.Z = (float)((viewport->CenterY - y - 0.5) / viewport->InvZtoScale * zspan);
 			drawerargs.dc_viewpos_step.X = (float)(zspan / viewport->CenterX);
 
-			static DrawerLight lightbuffer[64 * 1024];
-			static int nextlightindex = 0;
-			
 			// Plane normal
 			drawerargs.dc_normal.X = 0.0f;
 			drawerargs.dc_normal.Y = 0.0f;
 			drawerargs.dc_normal.Z = (y >= viewport->CenterY) ? 1.0f : -1.0f;
 
-			// Setup lights for row
-			drawerargs.dc_num_lights = 0;
-			drawerargs.dc_lights = lightbuffer + nextlightindex;
+			// Calculate max lights that can touch the row so we can allocate memory for the list
+			int max_lights = 0;
 			VisiblePlaneLight *cur_node = light_list;
-			while (cur_node && nextlightindex < 64 * 1024)
+			while (cur_node)
+			{
+				if (!(cur_node->lightsource->flags2&MF2_DORMANT))
+					max_lights++;
+				cur_node = cur_node->next;
+			}
+
+			drawerargs.dc_num_lights = 0;
+			drawerargs.dc_lights = Thread->FrameMemory->AllocMemory<DrawerLight>(max_lights);
+
+			// Setup lights for row
+			cur_node = light_list;
+			while (cur_node)
 			{
 				double lightX = cur_node->lightsource->X() - ViewPos.X;
 				double lightY = cur_node->lightsource->Y() - ViewPos.Y;
@@ -244,7 +252,6 @@ namespace swrenderer
 					uint32_t green = cur_node->lightsource->GetGreen();
 					uint32_t blue = cur_node->lightsource->GetBlue();
 
-					nextlightindex++;
 					auto &light = drawerargs.dc_lights[drawerargs.dc_num_lights++];
 					light.x = lx;
 					light.y = lconstant;
@@ -255,9 +262,6 @@ namespace swrenderer
 
 				cur_node = cur_node->next;
 			}
-
-			if (nextlightindex == 64 * 1024)
-				nextlightindex = 0;
 		}
 		else
 		{
diff --git a/src/swrenderer/r_swcanvas.cpp b/src/swrenderer/r_swcanvas.cpp
index aa817e707..82f34313f 100644
--- a/src/swrenderer/r_swcanvas.cpp
+++ b/src/swrenderer/r_swcanvas.cpp
@@ -110,6 +110,13 @@ void SWCanvas::DrawTexture(DCanvas *canvas, FTexture *img, DrawParms &parms)
 		double centeryback = viewport->CenterY;
 		viewport->CenterY = 0;
 
+		int oldviewwindowx = 0;
+		int oldviewwindowy = 0;
+		oldviewwindowx = viewwindowx;
+		oldviewwindowy = viewwindowy;
+		viewwindowx = 0;
+		viewwindowy = 0;
+
 		// There is not enough precision in the drawing routines to keep the full
 		// precision for y0. :(
 		double sprtopscreen;
@@ -187,6 +194,8 @@ void SWCanvas::DrawTexture(DCanvas *canvas, FTexture *img, DrawParms &parms)
 		}
 
 		viewport->CenterY = centeryback;
+		viewwindowx = oldviewwindowx;
+		viewwindowy = oldviewwindowy;
 	}
 
 	viewport->RenderTarget->Unlock();