Tilemap questions

SDK Development Discussion
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A couple tilemap questions that I haven't been able to get working as I'd expect:

  1. Is there a way to have the imageDrawMode affect drawing of tilemaps? I want to create a "fog of war" effect, and have 2 tilemaps: one with the actual game world and one for the foggy "cloud" effect that's drawn on top. As the game world is revealed, it's done by just removing tiles from the fog layer. This doesn't work, though, because the white parts of the fog layer are drawn transparent, so you can still see the game world underneath.

  2. Are there options (or planned in a roadmap) for hidden tiles and/or user data attached to tiles?

Thanks!

Edit: Just wanted to note that I've tried things like imageTable:getImage(fog):addMask(true), which also doesn't work.