diff --git a/ppfun-bridge/src/pixelplanet/loadChunk.js b/ppfun-bridge/src/pixelplanet/loadChunk.js
index a597df9..6c260a3 100644
--- a/ppfun-bridge/src/pixelplanet/loadChunk.js
+++ b/ppfun-bridge/src/pixelplanet/loadChunk.js
@@ -1,4 +1,5 @@
 import fetch from 'node-fetch';
+import sharp from 'sharp';
 
 import {
   TILE_SIZE,
@@ -9,7 +10,6 @@ async function fetchBaseChunk(
   palette,
   zoom,
   cx, cy,
-  tile,
 ) {
   const url = `https://pixelplanet.fun/chunks/${canvasId}/${cx}/${cy}.bmp`;
   console.log(`Fetching ${url}`);
@@ -24,10 +24,17 @@ async function fetchBaseChunk(
   throw new Error(`Chunk faulty or not found`);
 }
 
-function fetchTile(canvasId, zoom, cx, cy, tile) {
+async function fetchTile(canvasId, zoom, cx, cy) {
   const url = `https://pixelplanet.fun/tiles/${canvasId}/${zoom}/${cx}/${cy}.webp`;
   console.log(`Fetching ${url}`);
-  return sharp(url).removeAlpha().raw().toBuffer();
+  const response = await fetch(url);
+  if (response.ok) {
+    const arrayBuffer = await response.arrayBuffer();
+    if (arrayBuffer.byteLength) {
+      return sharp(arrayBuffer).removeAlpha().raw().toBuffer();
+    }
+  }
+  throw new Error(`Chunk faulty or not found`);
 }
 
 /**
@@ -47,13 +54,12 @@ export default async function (
   const canvasId = canvas.id;
   try {
     if (canvas.maxTiledZoom === zoom) {
-      return await fetchBaseChunk(canvasId, canvas.palette, zoom, cx, cy, tile);
+      return await fetchBaseChunk(canvasId, canvas.palette, zoom, cx, cy);
     } else {
-      return await fetchTile(canvasId, zoom, cx, cy, tile);
+      return await fetchTile(canvasId, zoom, cx, cy);
     }
-  } catch () {
-      console.log(`Chunk ${cx} / ${cy} - ${zoom} is empty of faulty`);
-      return Buffer.allocUnsafe(0);
+  } catch (err) {
+    console.log(`Chunk ${cx} / ${cy} - ${zoom}: ${err.message}`);
+    return Buffer.allocUnsafe(0);
   }
-  return tile;
 }
diff --git a/ppfun-bridge/src/pixelplanet/renderCanvas.js b/ppfun-bridge/src/pixelplanet/renderCanvas.js
index 2dc7a4c..ed7939d 100644
--- a/ppfun-bridge/src/pixelplanet/renderCanvas.js
+++ b/ppfun-bridge/src/pixelplanet/renderCanvas.js
@@ -32,17 +32,13 @@ async function fillRect(
     h += y;
     y = 0;
   }
-  if (w > width) {
-    w = width;
+  if (w + x > width) {
+    w = width - x;
   }
-  if (h > height) {
-    h = height;
+  if (h + y > height) {
+    h = height - y;
   }
-  if (w < 0 || h < 0) {
-    // out of image bounds
-    return;
-  }
-  const rowMax = r + h;
+  const rowMax = y + h;
   for (let row = y; row < rowMax; row += 1) {
     let pos = (row * width + x) * 3;
     const max = pos + w * 3;
@@ -62,27 +58,27 @@ async function drawChunk(
   const chunkBuffer = await getChunk(canvas, tiledZoom, xc, yc);
   const [ emptyR, emptyG, emptyB ] = canvas.palette.rgb;
   let row = Math.max(-yOff,  0);
-  const rowMax = Math.min(TILE_SIZE - yOff + height, TILE_SIZE);
+  const rowMax = (TILE_SIZE + yOff > height) ? height - yOff : TILE_SIZE;
   const colMin = Math.max(-xOff, 0);
-  const colMax = Math.min(TILE_SIZE - xOff + width, TILE_SIZE);
+  const colMax = (TILE_SIZE + xOff > width) ? width - xOff : TILE_SIZE;
   if (colMax < 0 || rowMax < 0) {
     // out of image bounds
     return;
   }
   const cutWidth = colMax - colMin;
   for (; row < rowMax; row += 1) {
-    let pos = (row * TILE_SIZE + colMin) * 3;
+    let ib = (row * TILE_SIZE + colMin) * 3;
+    let pos = ((row + yOff) * width + colMin + xOff) * 3;
     const max = pos + cutWidth * 3;
-    let ib = ((row + yOff) * width + colMin + xOff) * 3;
     while (pos < max) {
-      if (pos < chunkBuffer.length) {
-        buffer[ib++] = chunkBuffer[pos++];
-        buffer[ib++] = chunkBuffer[pos++];
-        buffer[ib++] = chunkBuffer[pos++];
+      if (ib < chunkBuffer.byteLength) {
+        buffer[pos++] = chunkBuffer[ib++];
+        buffer[pos++] = chunkBuffer[ib++];
+        buffer[pos++] = chunkBuffer[ib++];
       } else {
-        buffer[ib++] = emptyR;
-        buffer[ib++] = emptyG;
-        buffer[ib++] = emptyB;
+        buffer[pos++] = emptyR;
+        buffer[pos++] = emptyG;
+        buffer[pos++] = emptyB;
       }
     }
   }
@@ -98,6 +94,7 @@ async function drawChunk(
  * @param height height of image (optional)
  */
 export default async function renderCanvas(
+  title,
   canvas,
   x,
   y,
@@ -125,10 +122,10 @@ export default async function renderCanvas(
   const relScaleW = width / unscaledWidth;
   const relScaleH = height / unscaledHeight;
   // canvas coordinates of corners
-  const tlX = Math.floor(x - unscaledWidth / 2 / relScaleW);
-  const tlY = Math.floor(y - unscaledHeight / 2 / relScaleH);
-  const brX = Math.floor(x - 1 + unscaledWidth / 2 / relScaleW);
-  const brY = Math.floor(y - 1 + unscaledHeight / 2 / relScaleH);
+  const tlX = Math.floor(x - width / 2 / scale);
+  const tlY = Math.floor(y - height / 2 / scale);
+  const brX = Math.floor(x - 1 + width / 2 / scale);
+  const brY = Math.floor(y - 1 + height / 2 / scale);
   // chunk coordinates of chunks in corners
   const tlCX = coordToChunk(tlX, canvasSize, tiledScale);
   const tlCY = coordToChunk(tlY, canvasSize, tiledScale);
@@ -142,10 +139,11 @@ export default async function renderCanvas(
   const promises = [];
   for (let xc = tlCX; xc <= brCX; xc += 1) {
     for (let yc = tlCY; yc <= brCY; yc += 1) {
-      const xOff = chunkToCoord(xc, canvasSize, tiledScale) - tlX;
-      const yOff = chunkToCoord(yc, canvasSize, tiledScale) - tlY;
+      const xOff = Math.round((chunkToCoord(xc, canvasSize, tiledScale) - tlX) * tiledScale);
+      const yOff = Math.round((chunkToCoord(yc, canvasSize, tiledScale) - tlY) * tiledScale);
       if (xc < 0 || xc >= chunkMax || yc < 0 || yc >= chunkMax) {
         // out of canvas bounds
+        console.log(`Chunk ${xc}, ${yc} out of canvas bounds`);
         promises.push(
           fillRect(
             pixelBuffer, unscaledWidth, unscaledHeight,
@@ -153,14 +151,15 @@ export default async function renderCanvas(
             ...BACKGROUND_CLR_RGB,
           ),
         );
+      } else {
+        promises.push(
+          drawChunk(
+            pixelBuffer, unscaledWidth, unscaledHeight,
+            xOff, yOff,
+            canvas, tiledZoom, xc, yc,
+          ),
+        );
       }
-      promises.push(
-        drawChunk(
-          pixelBuffer, unscaledWidth, unscaledHeight,
-          xOff, yOff,
-          canvas, tiledZoom, xc, yc,
-        ),
-      );
     }
   }
   await Promise.all(promises);
@@ -172,13 +171,13 @@ export default async function renderCanvas(
         channels: 3,
       },
     })
-    .resize({ width, height })
+    .resize({ width, height, kernel: 'nearest' })
     .png()
     .toBuffer();
 
   return {
-    image: imageBuffer.buffer,
-    name: `ppfun-snap-${canvas.title}_${x}_${y}_${z}.png`,
+    image: imageBuffer,
+    name: `ppfun-snap-${title}.png`,
     type: 'image/png',
     w: width,
     h: height,
diff --git a/ppfun-bridge/src/ppfunMatrixBridge.js b/ppfun-bridge/src/ppfunMatrixBridge.js
index c66e19f..14375b1 100644
--- a/ppfun-bridge/src/ppfunMatrixBridge.js
+++ b/ppfun-bridge/src/ppfunMatrixBridge.js
@@ -177,10 +177,12 @@ class PPfunMatrixBridge {
 
     const userId = event.sender;
 
-    // block none :pixelplanet.fun users
+    /*
+     * block none :pixelplanet.fun users
     if (!userId.endsWith(this.domain)) {
       return;
     }
+    */
 
     const uid = (userId.startsWith(`@${this.prefix}_`)
       && userId.endsWith(this.domain))
@@ -239,7 +241,7 @@ class PPfunMatrixBridge {
 
   async run() {
     console.log('STARTING MATRIX CONNECTION');
-    await this.matrixBridge.run(this.port, null, 'localhost');
+    await this.matrixBridge.run(this.port, null, '127.0.0.1');
     console.log('STARTING PPFUN CONNECTION');
     await this.ppfunSocket.run();
     console.log('BRIDGE CONNECTED');