We now have guiding shadows for destructive skills and builders, as well as gliders. However, it can still be difficult to determine what is safe fall distance and what is splat fall distance. Therefore, is it possible if you can try to implement some sort of "ruler" to measure if the fall distance is safe or deadly? This might be very hard to code though.
Edit: Now further suggested for the editor (along with construction skill / destruction skill and blocker rulers)
Already implemented in the V1.48n experimental; hold the D button to activate it. The top of the ruler should be placed in line with the terrain the lemmings are falling from; if the top pixel of the ground they're landing on is within the white area, it's safe.
Thanks! :)
On the topic of this, I remember that Cheapo had "sketches" you could use in the editor for things like builders and fall distance.
Considering we have the guiding shadows when playing, it would be nice to be able to place them as references in the editor.
They wouldn't display in gameplay, and would only exist for the creator's reference.
Perhaps a simpler solution is to add such a piece as a background object to one style (remember that you can mix styles now). Then level designers can keep this tile in the level, if they want to help the player a bit. And they can simply delete it, if it doesn't fit well in the level.
If you want to be sure it doesn't actually appear in the level, you could use the Secret Level Trigger object type. On V1.47n onwards, these objects are neither visible nor functional in-game.
Still, proper sketches functionality should be added...
Until proper support is added, here's an interim measure.
The pieces are all set to the "Secret Level Trigger" type, which means they'll neither show up nor do anything in V1.47n and higher. They may have issues on V1.43n-F for that reason, but then, you can't mix graphic sets there anyway, making it useless.
However, be sure not to leave this as the primary graphic set in a level.