Dear Frieda, How are you? Good to hear from you!
I've been in the same situation regarding black backgrounds, although I don't recall now for sure how I solved it or went around it. Testing in the app (v.14.3.12), I confirm that PNG files with transparent bkg do not enjoy real transparency, but inherit in Jmol the bkg color of the Jmol background. This, together with a trick, may give you what you need: image echos may be sent to the back, so the model will display over them -- and to all effects, the image bkg merges with the global bkg and makes no interference with the model. background white set echo ~test2 image "some.png" set echo ~test2 scale 0.4 set echo ~test2 depth 0 Regarding the 2 echo images not living together, it might be an issue with the javacript or HTML5 canvas. Have you tested with the applet? Best, Angel
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