Yes, I didn't understand that. Strange.
However, I have now implemented your other solution using movement and scaling with events. This works as expected. The only problem now is that I have been mixing sprites and tilemaps on different elevations to create my map. Basically, I have used tilemaps for floors and sprites for walls, creatures and objects. With Construct 3's z elevation this wasn't a problem, but since tilemaps can't be scaled I don't think they can't be put on different elevations using events, at least not easily. Also, z-sorting tilemaps and sprites together seems to be difficult to achieve using events.
Painting the tilemaps onto DrawingCanvases would solve the scaling issue, but not the z sorting issue. Z-sorting would be solved if DrawingCanvases could be put into the same family as sprites, and the family then being z sorted, but mixed families aren't allowed, as far as i know. I will have to think about this some more. Perhaps I will have to convert everyting to sprites instead.
Anyway, thanks a lot for your help!