diff --git a/src/Renderer.cpp b/src/Renderer.cpp
index 7f6f9cc49..58d44446b 100644
--- a/src/Renderer.cpp
+++ b/src/Renderer.cpp
@@ -2001,18 +2001,18 @@ Renderer::Renderer(Graphics * g, Simulation * sim):
 	glEnable(GL_TEXTURE_2D);
 	glGenTextures(1, &partsTFX);
 	glBindTexture(GL_TEXTURE_2D, partsTFX);
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, XRES, YRES, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, XRES/CELL, YRES/CELL, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
 
-	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
-	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
 
 	glBindTexture(GL_TEXTURE_2D, 0);
 	glGenTextures(1, &partsTFY);
 	glBindTexture(GL_TEXTURE_2D, partsTFY);
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, XRES, YRES, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, XRES/CELL, YRES/CELL, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
 
-	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
-	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
+	glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
 
 	glBindTexture(GL_TEXTURE_2D, 0);
 	glDisable(GL_TEXTURE_2D);
diff --git a/src/game/GameView.cpp b/src/game/GameView.cpp
index 1e4ca76f2..a10d9e4b4 100644
--- a/src/game/GameView.cpp
+++ b/src/game/GameView.cpp
@@ -865,6 +865,8 @@ void GameView::OnDraw()
 		ren->render_fire();
 		ren->draw_grav();
 		ren->DrawWalls();
+		ren->DrawSigns();
+		ren->FinaliseParts();
 		if(activeBrush && currentMouse.X > 0 && currentMouse.X < XRES && currentMouse.Y > 0 && currentMouse.Y < YRES)
 		{
 			if(drawMode==DrawRect && isMouseDown)
@@ -880,8 +882,6 @@ void GameView::OnDraw()
 				activeBrush->RenderPoint(g, c->PointTranslate(currentMouse));
 			}
 		}
-		ren->DrawSigns();
-		ren->FinaliseParts();
 		ren->RenderZoom();
 
 		if(selectMode!=SelectNone)
diff --git a/src/render/RenderView.cpp b/src/render/RenderView.cpp
index e44c72f72..f0868a358 100644
--- a/src/render/RenderView.cpp
+++ b/src/render/RenderView.cpp
@@ -239,9 +239,14 @@ void RenderView::OnDraw()
 	g->clearrect(0, 0, XRES, YRES+MENUSIZE);
 	if(ren)
 	{
+		ren->clearScreen(1.0f);
 		ren->draw_air();
 		ren->render_parts();
 		ren->render_fire();
+		ren->draw_grav();
+		ren->DrawWalls();
+		ren->DrawSigns();
+		ren->FinaliseParts();
 	}
 	g->draw_line(0, YRES, XRES-1, YRES, 255, 255, 255, XRES+BARSIZE);
 	g->draw_line(180, YRES, 180, YRES+MENUSIZE, 200, 200, 200, XRES+BARSIZE);
diff --git a/src/simulation/tools/Grav.cpp b/src/simulation/tools/Grav.cpp
new file mode 100644
index 000000000..630ba1265
--- /dev/null
+++ b/src/simulation/tools/Grav.cpp
@@ -0,0 +1,18 @@
+#include "simulation/Tools.h"
+#include "simulation/Simulation.h"
+//#TPT-Directive ToolClass Tool_Grav TOOL_GRAV 4
+Tool_Grav::Tool_Grav()
+{
+	Identifier = "DEFAULT_TOOL_GRAV";
+	Name = "GRAV";
+	Colour = PIXPACK(0xCCCCFF);
+	Description = "Creates a short-lasting gravity well";
+}
+
+int Tool_Grav::Perform(Simulation * sim, Particle * cpart, int x, int y, float strength)
+{
+	sim->gravmap[((y/CELL)*(XRES/CELL))+(x/CELL)] += 0.03f*strength;
+	return 1;
+}
+
+Tool_Grav::~Tool_Grav() {}
\ No newline at end of file