Isometric add-ons follow the same 2:1 lines as the building they sit on. Vertical edges stay vertical, tops are lighter than sides. Draw a balcony around my building block below, then try a rooftop window and a tent.
This sprite is wide. It's easier to draw on a computer, or with your phone turned sideways.
Step 1
Colors for this step
This step also removes a few pixels. Use the eraser where the guide fades a pixel out.
Tools
Guide
Animation
Show the finished step
You did it!
Your balcony fits the building. Next, try the rooftop window and the tent below, on the same block.
Why a building block
The block has exactly the size of one floor of my isometric mockup. When every add-on is drawn on the same block, everything stays in scale, and later the pieces stack into a whole building. In the course worksheet you get the example on top and a blueprint below to work on.
The balcony
It's the hardest of the three, and it builds on the platform from the isometric warm up. The floor is a flat isometric slab: its top lighter, its side darker, both on 2:1 lines. The railing posts go strictly vertical, and the top bar runs parallel to the floor edge. Keep the spacing between posts the same all the way around.
Next: rooftop window and tent
Rooftop window: the easiest. Use 45 degree lines where the panes meet, the top lighter than the side, and a small drop shadow.Tent: stripes that follow the 2:1 edge, lighter on top and darker on the hanging side.
Start with the window, then the tent, then the balcony again without the guide. The palettes are only a start: don't be afraid to try your own colors.