What can I do with Silent Image?

[Bagpuss]

Why would you need to make the floor invisible? Given realistic colors, I could paint something that looks like a pit, and I didn't make the floor invisible. Or better yet, take a movie like Indiana Jones and the Last Crusade, where he has to walk in mid-air. That looked a lot like a pit, but it wasn't.

I'd be against allowing a pit as well, for the illusion to be effective and still 'flat' it could only ever work on one target as to appear correct for them it would be incorrect for the person standing next to them, or if they changed position. As Figments require everyone to see the same image thing a flat picture of a pit won't work. For an illusion of a pit to work you need to have a 3D illusion that sinks into the floor going over the ground that's really there, that needs a Glamer, IMO.

The Image spells are Figments, meaning they can create something that isn't there but can't mask something that is. To do that you require a Glamer illusion.

This thread has got me re-reading the differences between the sub-types of illusion and checking what each spell is. You need Glamers to change things that exist but Figments can create things that arn't there. In this case the ground exists so a Figment doesn't cut it, IMO.