We recommend using the Wallpaper Engine app to browse for new wallpapers, since it provides better filter options. Use the Discover tab in the app to quickly view a wide variety of recommended wallpapers from a large number of different categories and art styles.
Adjust your filter settings
Take a look at the following page to see how to adjust your filter settings:
You can adjust your general content preferences for your Steam account by visiting the Steam account settings page. Adjust your age-rating preferences for "Community" content according to your liking, this will allow you to easily enable and disable adult content: