I tried the DHTML version of Lzpix with master sprite activated, http://localhost:8080/openlaszlo-4.8.1/demos/lzpix/app.lzx?lzr=dhtml&lzusemastersprite=true
The images are not displayed in the application in that case, all graphical assets seem to be missing. When I turn debug on, everything works fine: http://localhost:8080/openlaszlo-4.8.1/demos/lzpix/app.lzx?lzusemastersprite=true&lzr=dhtml&debug=true
