So I started with a google search to grab and clip.
results Using hsetroot to stick smaller image in the center and add some ambience to feather it in.
Code: Select all
hsetroot -add "#000000" -add "#200000" -gradient 0 -center ~/Pictures/Wallpapers/bbq_desktop.png &
Edit: typos and a little insight.
The IIRC the fist number #200000 was the bottom and #00000 was the top the gradient was in degrees 0 = 12 O'clock position.