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Cloud FG effect (315, rev. 4)
By  MeroMero on 05-15-13, 06:00 pm
Category 'Effects and decorations', known, fully documented
(no description)
Data files:
• /polygon_unit/evf_cloud1.nsbtx
Sprite fields:
Direction: list at nybble 4: 0=Left-down,1=Left-up,2=Right-down,3=Right-up
Opacity: value at nybble 5-6. Modulo 32. 0 is transparent, 30 is almost opaque, 31 is completely red.
Mixed shift: value at nybble 7. Up-shift is 3*(n mod 4) tiles, and left-shift is 4*(n\4) tiles where n is the value of this nybble.
Left-shift: value at nybble 8. Moves by n pixels where n is the value of this nybble.
Up-shift: value at nybble 9. Moves by 20*n pixels where n is the value of this nybble.
Horizontal speed: value at nybble 10. 0 scrolls with the BG, 15 is the fastest.
Vertical speed: value at nybble 11. 0 scrolls with the BG, 15 is the fastest.
Cloud FG effect (315, rev. 5)
By  MeroMero on 08-29-13, 09:38 am
Category 'Effects and decorations', known, fully documented
(no description)
Data files:
• /polygon_unit/evf_cloud1.nsbtx
Sprite fields:
Direction: list at nybble 4: 0=Left-down,1=Left-up,2=Right-down,3=Right-up
Opacity: value at nybble 5-6. Modulo 32. 0 is transparent, 30 is almost opaque, 31 is completely red.
Mixed shift: value at nybble 7. Up-shift is 3*n tiles, and left-shift is 4*(n\4) tiles where n is the value of this nybble.
Horizontal scrolling: value at nybble 8. 0 is the slowest, 15 is the fastest.
Vertical scrolling: value at nybble 9. 0 is the slowest, 15 is the fastest.
Horizontal speed: value at nybble 10. 0 is the slowest, 15 is the fastest.
Vertical speed: value at nybble 11. 0 is the slowest, 15 is the fastest.