Potential Improvement: Use #FF00FF (Neon Pink) to indicate background errors rather than nothing

[rowanfr]

This is mostly talking about the draw function in wallpapers.rs. Some of the uses of continue could be replaced with setting the color used to indicate a texture error as #FF00FF instead of just skipping the loop. I think this would be an improvement as it could indicate more precisely what's failing while still giving some visual feedback but the tracing macros already do a good enough job at that so this might be a redundant suggestion. It's exceptionally easy to implement so this issue should be more seen as questioning if that's desired functionality for users or not.