Bug while scrolling on a big map

I currently have a map that is 200x87 hexagons. Whenever I try scrolling through the map, it disappears after a certain point.

That's a pretty big map.  It's likely this is just the way the browser handles running out of graphic memory.  We can try the standard debugging steps and see if there is anything fixable, but I suspect we'll end up just finding out it is a limitation in the browser.

I'm sorry you're having trouble with the site. Can you please follow Steps 1-3 of our Solving Technical Issues wiki page, taking special care to temporarily disable all browser add-ons and extensions, temporarily pause your anti-virus, and try switching browsers (for Chrome/Firefox specific issues) to see if one of those components is causing the problem. If all of that fails, please follow Step 4, including providing all of the necessary information, so that we can further assist you.

The Aaron said:

That's a pretty big map.  It's likely this is just the way the browser handles running out of graphic memory.  We can try the standard debugging steps and see if there is anything fixable, but I suspect we'll end up just finding out it is a limitation in the browser.

If that's the issue you might be able to save some browser overhead by changing to No Grid or Square Grid (invisible if you like) on Roll20 Page Settings, and if Hexes are needed then put the Hexes on your map graphic in your Graphics program. Hex maps, I've found particularly those with Show Labels turned on (that numbers every hex) seems to cause a fair amount of processing compared to a no-grid or square grid. That said it looks like Jean-Luc does not have Show Labels turned on.

The hex grid has the purpose of showing distance to my players. It fits perfectly with my map, so I can't change it to a square grid.

Even if it's the browser's fault (I will test that later), the app should do a better job at resizing the map to conserve memory.

I also tested it with multiple browsers (chrome, firefox and safari), all with the exact same result, so I highly doubt it's the browser's fault.

Ok, I've moved this post to bugs. Go ahead and perform the steps above, be sure to post the log from Step 4 when you get there. 

• A detailed description of the issue. The more information you can give us, the better able we'll be to fix the issue promptly!

A horizontal hex map with dimensions 199x84 has issues with rendering. Issues differ from platform to platform.

• Step by step instructions on how to reproduce the issue.

Make a 199x84 map and put a big picture in it

• Your computer's settings 1:
• Web Browser: Chrome, Firefox and Safari
• Browser Version: Respectively 44.0.2403.155(64 bit), 40.0, 8.0.7 (10600.7.12)
• Operating System: OS X Yosemite 10.10.4
• If Javascript is enabled: yes
• Your anti-virus software: none
• List of any browser add-ons or extensions enabled: Adblock (Except on safari)
• Your computer's settings  2:
  • Web Browser: Chrome
  • Browser Version: 44.0.2403.155 m
  • Operating System: Windows 8.1 Pro-64 bit (6.3, Build 9600)
  • If Javascript is enabled: yes
  • Your anti-virus software: Windows Defender
  • List of any browser add-ons or extensions enabled: Adblock

• A Console Log from the moment you logged into the page through when you encountered the issue.

Windows: https://docs.google.com/document/d/1DUy1Zlh5l6aydf...
Mac Chrome: https://docs.google.com/document/d/16_Yf8rwyzvMNFG...
Mac Firefox: https://docs.google.com/document/d/1vuI8BdIu2h1anx...
Mac Safari: https://docs.google.com/document/d/12RSFZswgradT0Y...

Jean-Luc, I'm not seeing anything from the logs that's showing it failing on Roll20's side. Go ahead and PM me the URL of your campaign and I'll take a look at the image and what could be going wrong.

Jean-Luc, usually it's best to send a campaign Join Link over private message, and not to post it on the forum where anyone could click and accidentally join your game.

For that reason I have deleted your post with the link, but don't worry, Steve will still be able to see the deleted post and get the link from there.

I have this happen quite often as well. Big maps do this.

I took a look at the map in your set up and didn't have any issues loading it or scrolling. Because it's happening for you and not others, it means it very well could be your browser is running out of memory and just failing to load the image.

Just to confirm when you say scrolling around, you don't mean just at the very bottom of the screen, but scrolling horizontally or any other place vertically? There is a known graphical issue with scrolling to the bottom of a page and having the background map seem longer than it should be or issues with the background image disappearing momentarily until you scroll up.

I was wondering if you could try and get me a screen shot from the developer tools, networking tab, of how the image is loading in for you. The image will be named original, it will be coming from the s3 server, and you should be able to click on it to get a preview. I'll also want the complete text of the console tab as well. 

You can get instructions on how to open the developer tools from Step 4 of our Solving Technical Issues wiki.

Steve, all my players had the same problem, so the problem is definitely not me.
I figured out how the symptoms work:
If you are zoomed in, the map is cut and you can't see the bottom.
If you are zoomed out almost at maximum, the map disappears when scrolling down.