SUMMARY STEPS TO REPRODUCE 1. open konvex. 2. choose a 3d model file. 3. click "Open" button to show this model in workarea. OBSERVED RESULT the work area is transprent.The underlying window is displayed as the background. EXPECTED RESULT workarea background follow systemtheme. SOFTWARE/OS VERSIONS Operating System: KDE neon Unstable Edition KDE Plasma Version: 6.4.80 KDE Frameworks Version: 6.17.0 Qt Version: 6.9.0 Kernel Version: 6.11.0-28-generic (64-bit)