Looks great as it is, Ede :)

Hieght is always a tricky one unless you employ a careful use of shadow effects, or even draw your own shadows on a separate sheet.

A shadow sheet above the cliffs and below the trees might be best for that second option - polygons of solid black drawn to cover the shaded sides of the canyon with a blend mode effect on that sheet set to multiply and about 20% opacity and then a blur effect to soften the edges quite significantly. That's a little more tricky than just using a few shadow sheet effects on the boulders, but probably more realistic as some of the shadow will fall on the boulders rather than coming from underneath them, and I think some of the shade will be cast by steep banks rather than the boulders.

An interesting idea, and rather a nice drawing of a rose :)

There's just one small thing that's catching my eye rather a lot. The door seems to be casting a bit of a strange shadow or glow. Maybe move it onto the walls sheet?

You can easily set up your own House style, and then use it to create your own Street styles.

The process is shown in several of the live mapping sessions. I will be back to edit and add a few links when I've found a good one.

EDIT: Try this one, Julian. https://www.youtube.com/watch?v=7dLtzBiObwY

Yes, that would have been my next suggestion if nothing we tried worked. Tech Support should be able to work out what's wrong.

That map of Steven's is a great map, and it is a pity he hasn't presented it in a thread so we can express our general appreciation of his work. However, since you are interested in creating something similar yourself a general approach might be to create your own House style using simple grey tone fills, change the land colour to something off-white, then add a new sheet with a Blend Mode set to Multiply right at the bottom of the sheet list where you can draw the overlying coloured polygons.