Read the statement by Michael Teeuw here.
CSS "z-index" is not working anymore
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 @davidnesbitt7 
 thanks for the solution.
 I am using MMM-RandomPhoto module, it can get 1080x1920 picture automatically and change in every 60 seconds.{ module: 'MMM-RandomPhoto', position: 'fullscreen_above', config: { opacity: 0.4, animationSpeed: 2000, updateInterval: 600, url: 'https://unsplash.it/1080/1920/?random' //1080x160 } },Maybe I can try add something in .js file below: 
 https://github.com/diego-vieira/MMM-RandomPhoto/blob/master/MMM-RandomPhoto.js
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 @iMAGiC Oh…I’m not familiar with that module, I can see that you have position: 'fullscreen_above';maybe tryposition: 'fullscreen_below'and see if that changes it to be below for you?
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 @davidnesbitt7 I’ve tried that, but not succeed… :disappointed: 
 thanks for your time, I will try others later…
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 @davidnesbitt7 finally I got some thing, I was add z-index in wrong place. I am now add z-index in MMM-RandomPhoto.js: img id="mmm-photos-placeholder1" style="z-index=-1;opacity: 0; position: absolute" img id="mmm-photos-placeholder2" style="z-index=-1;opacity: 0; position: absolute"and remark background in main.css: // background: #000;now it works, only issue is picture not shows from top, but it’s minor, when display behind mirror. :grin: 
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 @iMAGiC you shouldn’t edit the module code or the main.css file. You should do all css alterations in the custom.css file like background: nonein thebody{}tag and add#mmm-photos-placeholder1 {position: absolute; z-index: -1; opacity: 0} #mmm-photos-placeholder2 {position: absolute; z-index: -1; opacity: 0}to your custom.css 
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 @broberg Yes, I will modify it later. 
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 @broberg all set, thank you~ in custom.css html { cursor: none; overflow: hidden; background: transparent; } .region.fullscreen * { pointer-events: auto; position: top; top: 0px; }
 
 


