diff --git a/src/net/torvald/terrarum/App.java b/src/net/torvald/terrarum/App.java
index abfc6b84d..f0f885761 100644
--- a/src/net/torvald/terrarum/App.java
+++ b/src/net/torvald/terrarum/App.java
@@ -482,7 +482,7 @@ public class App implements ApplicationListener {
         hq2x = new Hq2x(2);
 
         fullscreenQuad = new Mesh(
-                true, 4, 6,
+                true, 4, 4,
                 VertexAttribute.Position(),
                 VertexAttribute.ColorUnpacked(),
                 VertexAttribute.TexCoords(0)
@@ -578,7 +578,7 @@ public class App implements ApplicationListener {
             shaderPassthruRGBA.setUniformi("u_texture", 0);
             postProcessorOutFBO2.getColorBufferTexture().setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear);
             postProcessorOutFBO2.getColorBufferTexture().bind(0);
-            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLES);
+            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLE_FAN);
         }
         else if (getConfigDouble("screenmagnifying") < 1.01 || getConfigString("screenmagnifyingfilter").equals("none")) {
             shaderPassthruRGBA.bind();
@@ -586,7 +586,7 @@ public class App implements ApplicationListener {
             shaderPassthruRGBA.setUniformi("u_texture", 0);
             postProcessorOutFBO.getColorBufferTexture().setFilter(Texture.TextureFilter.Nearest, Texture.TextureFilter.Nearest);
             postProcessorOutFBO.getColorBufferTexture().bind(0);
-            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLES);
+            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLE_FAN);
         }
         else if (getConfigString("screenmagnifyingfilter").equals("bilinear")) {
             shaderPassthruRGBA.bind();
@@ -594,7 +594,7 @@ public class App implements ApplicationListener {
             shaderPassthruRGBA.setUniformi("u_texture", 0);
             postProcessorOutFBO.getColorBufferTexture().setFilter(Texture.TextureFilter.Linear, Texture.TextureFilter.Linear);
             postProcessorOutFBO.getColorBufferTexture().bind(0);
-            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLES);
+            fullscreenQuad.render(shaderPassthruRGBA, GL20.GL_TRIANGLE_FAN);
         }
 
 
@@ -653,7 +653,7 @@ public class App implements ApplicationListener {
         shaderBayerSkyboxFill.setUniformf("parallax_size", 0f);
         shaderBayerSkyboxFill.setUniformf("topColor", gradWhiteTop.r, gradWhiteTop.g, gradWhiteTop.b, 1f);
         shaderBayerSkyboxFill.setUniformf("bottomColor", gradWhiteBottom.r, gradWhiteBottom.g, gradWhiteBottom.b, 1f);
-        fullscreenQuad.render(shaderBayerSkyboxFill, GL20.GL_TRIANGLES);
+        fullscreenQuad.render(shaderBayerSkyboxFill, GL20.GL_TRIANGLE_FAN);
 
 
         setCameraPosition(0f, 0f);
@@ -1093,7 +1093,7 @@ public class App implements ApplicationListener {
                 WIDTH, HEIGHT, 0f, 1f, 1f, 1f, 1f, 1f, 0f,
                 0f, HEIGHT, 0f, 1f, 1f, 1f, 1f, 0f, 0f
         });
-        mesh.setIndices(new short[]{0, 1, 2, 2, 3, 0});
+        mesh.setIndices(new short[]{0, 1, 2, 3});
     }
 
     public static void setGamepadButtonLabels() {
diff --git a/src/net/torvald/terrarum/TerrarumPostProcessor.kt b/src/net/torvald/terrarum/TerrarumPostProcessor.kt
index f34cbe299..fbf1e6656 100644
--- a/src/net/torvald/terrarum/TerrarumPostProcessor.kt
+++ b/src/net/torvald/terrarum/TerrarumPostProcessor.kt
@@ -255,7 +255,7 @@ object TerrarumPostProcessor : Disposable {
         shader.setUniformf("quant", shaderQuant[App.getConfigInt("displaycolourdepth")] ?: 255f)
         shader.setUniformf("vibrancy", 1f, vo, vg, 1f)
         shader.setUniformMatrix4fv("swizzler", swizzler, rng.nextInt(24), 16*4)
-        App.fullscreenQuad.render(shader, GL20.GL_TRIANGLES)
+        App.fullscreenQuad.render(shader, GL20.GL_TRIANGLE_FAN)
 
         Gdx.gl.glActiveTexture(GL20.GL_TEXTURE0) // so that batch that comes next will bind any tex to it
 
diff --git a/src/net/torvald/terrarum/modulebasegame/IngameRenderer.kt b/src/net/torvald/terrarum/modulebasegame/IngameRenderer.kt
index 7b8c43d1b..b2b6335f3 100644
--- a/src/net/torvald/terrarum/modulebasegame/IngameRenderer.kt
+++ b/src/net/torvald/terrarum/modulebasegame/IngameRenderer.kt
@@ -709,7 +709,7 @@ object IngameRenderer : Disposable {
             App.shaderPassthruRGBA.bind()
             App.shaderPassthruRGBA.setUniformMatrix("u_projTrans", camera.combined)
             App.shaderPassthruRGBA.setUniformi("u_texture", 0)
-            blurWriteQuad.render(App.shaderPassthruRGBA, GL20.GL_TRIANGLES)
+            blurWriteQuad.render(App.shaderPassthruRGBA, GL20.GL_TRIANGLE_FAN)
         }
     }
 
@@ -726,7 +726,7 @@ object IngameRenderer : Disposable {
             App.shaderPassthruRGBA.bind()
             App.shaderPassthruRGBA.setUniformMatrix("u_projTrans", camera.combined)
             App.shaderPassthruRGBA.setUniformi("u_texture", 0)
-            blurWriteQuad.render(App.shaderPassthruRGBA, GL20.GL_TRIANGLES)
+            blurWriteQuad.render(App.shaderPassthruRGBA, GL20.GL_TRIANGLE_FAN)
         }
 
         fboBlurHalf.inAction(camera, batch) {
@@ -737,7 +737,7 @@ object IngameRenderer : Disposable {
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
             shaderKawaseDown.setUniformf("halfpixel", KAWASE_POWER / fboBlurHalf.width, KAWASE_POWER / fboBlurHalf.height)
-            blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+            blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLE_FAN)
         }
 
         /*fboBlurQuarter.inAction(camera, batch) {
@@ -748,7 +748,7 @@ object IngameRenderer : Disposable {
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
             shaderKawaseDown.setUniformf("halfpixel", KAWASE_POWER / fboBlurQuarter.width, KAWASE_POWER / fboBlurQuarter.height)
-            blurWriteQuad4.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+            blurWriteQuad4.render(shaderKawaseDown, GL20.GL_TRIANGLE_FAN)
         }
 
         fboBlurHalf.inAction(camera, batch) {
@@ -759,7 +759,7 @@ object IngameRenderer : Disposable {
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
             shaderKawaseUp.setUniformf("halfpixel", KAWASE_POWER / fboBlurQuarter.width, KAWASE_POWER / fboBlurQuarter.height)
-            blurWriteQuad2.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+            blurWriteQuad2.render(shaderKawaseUp, GL20.GL_TRIANGLE_FAN)
         }*/
 
         outFbo.inAction(camera, batch) {
@@ -770,7 +770,7 @@ object IngameRenderer : Disposable {
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
             shaderKawaseUp.setUniformf("halfpixel", KAWASE_POWER / fboBlurHalf.width, KAWASE_POWER / fboBlurHalf.height)
-            blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+            blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLE_FAN)
         }
 
     }
@@ -780,19 +780,19 @@ object IngameRenderer : Disposable {
     fun resize(width: Int, height: Int) {
         if (!init) {
             blurWriteQuad = Mesh(
-                    true, 4, 6,
+                    true, 4, 4,
                     VertexAttribute.Position(),
                     VertexAttribute.ColorUnpacked(),
                     VertexAttribute.TexCoords(0)
             )
             blurWriteQuad2 = Mesh(
-                    true, 4, 6,
+                    true, 4, 4,
                     VertexAttribute.Position(),
                     VertexAttribute.ColorUnpacked(),
                     VertexAttribute.TexCoords(0)
             )
             /*blurWriteQuad4 = Mesh(
-                    true, 4, 6,
+                    true, 4, 4,
                     VertexAttribute.Position(),
                     VertexAttribute.ColorUnpacked(),
                     VertexAttribute.TexCoords(0)
@@ -847,21 +847,21 @@ object IngameRenderer : Disposable {
                 lightmapFbo.width.toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 lightmapFbo.width.toFloat(),lightmapFbo.height.toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f,lightmapFbo.height.toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+        blurWriteQuad.setIndices(shortArrayOf(0, 1, 2, 3))
 
         blurWriteQuad2.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
                 lightmapFbo.width.div(2).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 lightmapFbo.width.div(2).toFloat(),lightmapFbo.height.div(2).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f,lightmapFbo.height.div(2).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad2.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+        blurWriteQuad2.setIndices(shortArrayOf(0, 1, 2, 3))
 
         /*blurWriteQuad4.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
                 lightmapFbo.width.div(4).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 lightmapFbo.width.div(4).toFloat(),lightmapFbo.height.div(4).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f,lightmapFbo.height.div(4).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad4.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))*/
+        blurWriteQuad4.setIndices(shortArrayOf(0, 1, 2, 3))*/
     }
 
     override fun dispose() {
diff --git a/src/net/torvald/terrarum/ui/Toolkit.kt b/src/net/torvald/terrarum/ui/Toolkit.kt
index 4e0d67783..dcebfc76e 100644
--- a/src/net/torvald/terrarum/ui/Toolkit.kt
+++ b/src/net/torvald/terrarum/ui/Toolkit.kt
@@ -205,7 +205,7 @@ object Toolkit : Disposable {
                 shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
                 shaderKawaseDown.setUniformi("u_texture", 0)
                 shaderKawaseDown.setUniformf("halfpixel", radius3 / fboBlurHalf.width, radius3 / fboBlurHalf.height)
-                blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+                blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLE_FAN)
             }
 
             fboBlurQuarter.inAction(camera, batch) {
@@ -216,7 +216,7 @@ object Toolkit : Disposable {
                 shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
                 shaderKawaseDown.setUniformi("u_texture", 0)
                 shaderKawaseDown.setUniformf("halfpixel", radius3 / fboBlurQuarter.width, radius3 / fboBlurQuarter.height)
-                blurWriteQuad4.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+                blurWriteQuad4.render(shaderKawaseDown, GL20.GL_TRIANGLE_FAN)
             }
 
             fboBlurHalf.inAction(camera, batch) {
@@ -227,7 +227,7 @@ object Toolkit : Disposable {
                 shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
                 shaderKawaseUp.setUniformi("u_texture", 0)
                 shaderKawaseUp.setUniformf("halfpixel", radius3 / fboBlurQuarter.width, radius3 / fboBlurQuarter.height)
-                blurWriteQuad2.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+                blurWriteQuad2.render(shaderKawaseUp, GL20.GL_TRIANGLE_FAN)
             }
 
             fboBlur.inAction(camera,  batch) {
@@ -238,7 +238,7 @@ object Toolkit : Disposable {
                 shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
                 shaderKawaseUp.setUniformi("u_texture", 0)
                 shaderKawaseUp.setUniformf("halfpixel", radius3 / fboBlurHalf.width, radius3 / fboBlurHalf.height)
-                blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+                blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLE_FAN)
             }
         }*/
 
@@ -250,7 +250,7 @@ object Toolkit : Disposable {
             shaderKawaseDown.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseDown.setUniformi("u_texture", 0)
             shaderKawaseDown.setUniformf("halfpixel", blurRadius / fboBlurHalf.width, blurRadius / fboBlurHalf.height)
-            blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLES)
+            blurWriteQuad2.render(shaderKawaseDown, GL20.GL_TRIANGLE_FAN)
         }
 
         fboBlur.inAction(camera, batch) {
@@ -261,7 +261,7 @@ object Toolkit : Disposable {
             shaderKawaseUp.setUniformMatrix("u_projTrans", camera.combined)
             shaderKawaseUp.setUniformi("u_texture", 0)
             shaderKawaseUp.setUniformf("halfpixel", blurRadius / fboBlurHalf.width, blurRadius / fboBlurHalf.height)
-            blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLES)
+            blurWriteQuad.render(shaderKawaseUp, GL20.GL_TRIANGLE_FAN)
         }
 
 
@@ -315,19 +315,19 @@ object Toolkit : Disposable {
         }
 
         blurWriteQuad = Mesh(
-                true, 4, 6,
+                true, 4, 4,
                 VertexAttribute.Position(),
                 VertexAttribute.ColorUnpacked(),
                 VertexAttribute.TexCoords(0)
         )
         blurWriteQuad2 = Mesh(
-                true, 4, 6,
+                true, 4, 4,
                 VertexAttribute.Position(),
                 VertexAttribute.ColorUnpacked(),
                 VertexAttribute.TexCoords(0)
         )
         blurWriteQuad4 = Mesh(
-                true, 4, 6,
+                true, 4, 4,
                 VertexAttribute.Position(),
                 VertexAttribute.ColorUnpacked(),
                 VertexAttribute.TexCoords(0)
@@ -357,20 +357,20 @@ object Toolkit : Disposable {
                 fw.toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 fw.toFloat(), fh.toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f, fh.toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+        blurWriteQuad.setIndices(shortArrayOf(0, 1, 2, 3))
 
         blurWriteQuad2.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
                 fw.div(2).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 fw.div(2).toFloat(), fh.div(2).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f, fh.div(2).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad2.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+        blurWriteQuad2.setIndices(shortArrayOf(0, 1, 2, 3))
 
         blurWriteQuad4.setVertices(floatArrayOf(
                 0f,0f,0f, 1f,1f,1f,1f, 0f,1f,
                 fw.div(4).toFloat(),0f,0f, 1f,1f,1f,1f, 1f,1f,
                 fw.div(4).toFloat(), fh.div(4).toFloat(),0f, 1f,1f,1f,1f, 1f,0f,
                 0f, fh.div(4).toFloat(),0f, 1f,1f,1f,1f, 0f,0f))
-        blurWriteQuad4.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+        blurWriteQuad4.setIndices(shortArrayOf(0, 1, 2, 3))
     }
 }
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt b/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
index 6682a3ea9..b15237d3b 100644
--- a/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
+++ b/src/net/torvald/terrarum/worlddrawer/BlocksDrawer.kt
@@ -645,7 +645,7 @@ internal object BlocksDrawer {
         )
         shader.setUniformf("mulBlendIntensity", if (mode == OCCLUSION) occlusionIntensity else 1f)
         //shader.setUniformf("drawBreakage", if (mode == WIRE) 0f else 1f)
-        tilesQuad.render(shader, GL20.GL_TRIANGLES)
+        tilesQuad.render(shader, GL20.GL_TRIANGLE_FAN)
 
         //tilesBufferAsTex.dispose()
     }
@@ -676,7 +676,7 @@ internal object BlocksDrawer {
 
         if (oldScreenW != screenW || oldScreenH != screenH) {
             tilesQuad = Mesh(
-                    true, 4, 6,
+                    true, 4, 4,
                     VertexAttribute.Position(),
                     VertexAttribute.ColorUnpacked(),
                     VertexAttribute.TexCoords(0)
@@ -688,7 +688,7 @@ internal object BlocksDrawer {
                     App.scr.wf, App.scr.hf, 0f, 1f, 1f, 1f, 1f, 1f, 1f,
                     0f, App.scr.hf, 0f, 1f, 1f, 1f, 1f, 0f, 1f
             ))
-            tilesQuad.setIndices(shortArrayOf(0, 1, 2, 2, 3, 0))
+            tilesQuad.setIndices(shortArrayOf(0, 1, 2, 3))
         }
 
         oldScreenW = screenW