PEN NOW SUPPORTS ALPHA (i.e. 'ghosting') as of v435.2... It's kinda hard to use, though, 'cos each line you draw will 'ghost' over the top of any other lines you've already drawn. In particular, note that "pen down" draws a circle immediately where it is. That means if you then move the pen to draw a line, the start of the line appears to have a 'blob' because it was drawn twice. :( And if you want to fill a region with a uniform opacity, you must make sure you don't overlap any of the lines you use to fill it, otherwise the overlaps will be 'double-strength' too. :/ Also, if you want to make the opacity change along a line (as I have here) you can't really do it by drawing in segments, because the start of each line segment will overlap with the end of the previous (which is what you can see happening in this project). Ah well, let's see what we can do with it...
