maybe the wad is bad. wad are often coming from random illegal website and there were lot of untested releases.
You'll have to be more specific to tell which game didn't download a cover, so we can check if that game exists on gametdb, if covers are present on gametdb.
Another possibility is because you chose to download only HighQuality covers, and disabled the fallback to lowquality if HQ is not present.
same for "original" only, instead of fallback to "custom" covers.
when you'll be back home, verify your settings in the GUI menu.
All wads are good. i tested and played each one. came from a very reliable source. You might be right about the high quality setting. I do know the setting for covers is set to "original/custom" because i tried toggling that and had no effect.
here is my "missing images list". I only care about the games not the emulators as im favoriting the games so only they show on the menu.
seems like only the "custom discart" images are missing.
I do have the images for full, and 2d, and there are also the 3d images but they are not in a 3d folder, they are in the images folder which also contains the 2d and full folders.
ID Name ImageType
SEGA Genplus GX 3D Cover
HAGA HAGA 3D Cover
W64A Nintendo 64 3D Cover
SNES Snes9x Channel 3D Cover
UNEO USB Loader GX 3D Cover
SEGA Genplus GX 2D Cover
HAGA HAGA 2D Cover
W64A Nintendo 64 2D Cover
SNES Snes9x Channel 2D Cover
UNEO USB Loader GX 2D Cover
SEGA Genplus GX Full HQ Cover
HAGA HAGA Full HQ Cover
W64A Nintendo 64 Full HQ Cover
SNES Snes9x Channel Full HQ Cover
UNEO USB Loader GX Full HQ Cover
WBLE BUBBLE BOBBLE Plus! Custom Discart
FCWE FCWE Custom Discart
SEGA Genplus GX Custom Discart
HABA HABA Custom Discart
HACA HACA Custom Discart
HAFE HAFE Custom Discart
HAGA HAGA Custom Discart
HAGE HAGE Custom Discart
HAYA HAYA Custom Discart
DHGA Hugo-GX Custom Discart
WLOE LostWinds WotM Custom Discart
WFCE My Life as a King Custom Discart
W64A Nintendo 64 Custom Discart
SNES Snes9x Channel Custom Discart
NADE Star Fox 64 Custom Discart
UNEO USB Loader GX Custom Discart
W2ME W2ME Custom Discart
WAYE WAYE Custom Discart
WBKE WBKE Custom Discart
WF2E WF2E Custom Discart
WGDE WGDE Custom Discart
WGOE WGOE Custom Discart
WICE WICE Custom Discart
D26A Wii2600 Custom Discart
WJEE WJEE Custom Discart
WKTE WKTE Custom Discart
WLWE WLWE Custom Discart
WM8E WM8E Custom Discart
WRGE WRGE Custom Discart
WSNE WSNE Custom Discart
WTPE WTPE Custom Discart
WWRE WWRE Custom Discart