I don't know if this was intentional, but the most recent update seems to have made black filt unusable and unmakable without copy/pasting (originally made by setting filt's ctype to 2^30)
Also, unrelated, but try moving a sign off the left side of the screen then look at the element menus on the right before placing it.
You can use it to make invisible aray, which is very useful if you are hiding electronics.
The filt modes don't seem to work on bray. Invisible bray on it's own works fine, it just can't be created anymore.
This is intentional. Invisible particles make it very hard to see how saves work, and that is not something I'd like to encourage. In most cases, if something is invisible, it should be due to decoration (so that decorations can be disabled to make the particles visible).
If you can suggest a way of giving decoration colour to ARAY beams that isn't too confusing or hard to use, then that could possibly be added to allow invisible BRAY via decoration colour instead.
(Making FILT ctype=2^30 produce black dcolour would be confusing, since unless you know the history of FILT graphics behaviour it doesn't really make any sense for it to do that)
Graphics bugs when signs are partially offscreen have been fixed.
In the next version, as a result of http://tpt.io/.265916 and a71cb3, erasing all colours will stop the BRAY from travelling any further.
Maybe there could be a new filt mode that changes the aray colour to it's deco colour, that seems like it wouldn't be too confusing.