These images are selectable in the StreamedMP Editor. Under the "Basic Home Design" tab, if you click on the "Set Menu Theme" button, a new window will open. These are the 3DBackgrounds. Click on "Apply Selected Theme".
Then goto the "Default Background images" tab, and verify that the 3D images are shown for all your menu selections. If not, click on the corresponding "Change" button, and you can cycle through images, and possibly find one that suits your menu selection.
After remember to click on the "Generate Menu" button...but I think you know that.
Note: In case you didn't know, you can also change the Splash screen under the "Splash Screen" selector tab. There are some nice pics to choose there too.
I have emulators too, and the menu selection for those...but I never really totally set them up (yet)...though I should. I love playing those old games. The Netflix selection is actually using the MultiShortcut plugin, which will minimize MP and open the Kylo browser, which I have the homepage setup to my Netflix account. I can help you out there if you need a hand in setting something similar up. I tried a newer Netflix plugin...but didn't really like it.
Yeah, I'm still running MP 1.5.0 with StreamedMP 2.14.3385. I'm usually a little reluctant in jumping on the new versions until I know for sure the skin and most of my plugins are supported. I want to move to MP 1.6.0 since it now supports gapless audio.