I've tried SP1_AMASK_TRANS and SP1_AMASK_INK for attr_mask property in the sprite:
Code: Select all
c->attr_mask = SP1_AMASK_INK;
c->attr = INK_BLACK;
PAPER_BLACK | INK_WHITE
or just
PAPER_BLACK
How I could get such effect? Maybe inverting UDG to set INK instead of paper?
Lot of thanks.