This would be the ability to change whether an object is "solid" or not with events.
Currently you can only do this by going to "Groups--> Attributes" and then checking "solid" on or off.
Looks like I'm not the only one who has requested this... :)
Thank you very much and thank you for all of your efforts, Rich and Ashley!
(I'm sorry if I'm missing anyone else)
You can change the "solidity" using event by via "set collision mode". If you set collision mode to 'None' it will behave as if it's not solid.
Ah... thanks, mirosurabu. That works perfectly. :)