Common Technical Problems + Solutions

Hi! So I experienced a few issues that caused me to not be able to see the (beautiful) artwork that our DM (James) had set in the game canvas and after digging into Google and all sorts of technical troubleshooting docs related to Roll20, Chrome, and Firefox, I came up with nothing. Then I decided to use my professional skillset (programming/web development/software engineering) for the task and came up with some fixes to what I imagine to be common problems. Black canvas (graphics area is black, but all other UI elements render just fine). There is a problem with the HTML5 Canvas element when certain types of lighting are used on various clients. The workaround for this is to disable the #lightingcanvas element (&lt;canvas id="lightingcanvas" ...) by adding "display: none;" (without quotes) to the style attribute in the elements tab of your web console (F12 by default in Chrome and Firefox).&nbsp; Mixed Content warnings and missing visual elements. This is because the Roll20 developers are mixing HTTPS and HTTP locations, specifically with regard to images (who does that in 2016, right?). A temporary "fix" is to set a content exception in Chrome's settings for the domains of the failed content (<a href="http://imgsrv.roll20.net" rel="nofollow">http://imgsrv.roll20.net</a>) or to enter "about:config" in Firefox and set "security.mixed_content.*" to "false", then restart your browser. These settings should be returned to their default values for security purposes after you've exited the game (you'll need to set it manually) As I find more bugs/issues that could cause problems for us, I'll make sure to add them and their solutions to this thread so that we all have an internal reference.

Chrome seems to be the best browser for Roll20. Also be sure you are not running any java script blockers when playing. the lighting is done with that and it will be bugging as hell if you have anying filtering your java. I'm also a network admin =)&nbsp; So any type of ad blockers will screw with you.&nbsp;

Sorry to hear you're having issues with it. &nbsp;Let me know if you need me to change/test anything - I put up this inn map just to get dynamic lighting and whatnot tested out in a neutral area, so we can mess with it however you'd like if there's anything that might help. &nbsp;Otherwise, thanks for doing that digging!

Mike - Chrome blocks Java by default, there's no way around that (so far as I know). I tested in Firefox, but it's definitely not my default browser, however, the latest build also blocks Java by default (though there's a tweak for that). I don't use script or ad blockers, those end up becoming a bigger waste of cycles than to just let them cache to disk (and then sandbox the cache). James - I'm not sure what about the dynamic lighting is being difficult, but I can just disable that canvas client-side. I'll see if I can't find out about whether my graphics card is being auto-blacklisted for webGL/HTML5 dynamic lighting. Then it's just a setting that can be changed :)

Hey Brian - noted in the chat, so you probably didn't see it yet. &nbsp;I tried hiding&nbsp;#lightingcanvas myself and it looks like that gets rid of dynamic lighting altogether. &nbsp;Fog of war seems to work still, but if we're using dynamic lighting that kind or ruins the surprise/effect of it since you can see the whole map - monsters, secrets and all - without dynamic lighting's 'enforce line of sight' active. &nbsp;I can enable fog of war if that still works, but you'll still be able to see stuff others won't because of the line of sight.

Yeah, it sucks. I'm going to set up my other laptop (uses a beefier video card) and see if that helps, I just won't be able to until I next go to my office (since that's where I left it).

It's been fixed, I just needed my character to have "sight" :)

Sometimes its the simple solutions ;)

I didn't want to ask if he just didn't have his vision enabled, cause there was a lot of tech talk that goes over my head and thought it would be stupid :(

Haha, yeah, I've done that to myself at least half a dozen times - wasn't really thinking of it at the time until I went into the map and realized I had just thrown some tokens down without fixing them up. &nbsp;D'oh!