Work on each roof separately and keep the valleys intact
Trim the purple sheet into the dotted skyline. Preserve all three roof peaks and the low connections between them. Remove broad outside material first, then align a cutting edge with one roof slope at a time.
Look for the taller central peak between two lower roofs. Its slopes and valleys differ, so one large cut across the upper sheet cannot replace careful boundary work.
In Paper Skyline, keep the paper that forms the final profile as you trim the sheet.
Trace the full skyline before snipping
Identify the outer sides, each roof tip, the sloping edges and both valleys. The paper beneath that upper profile belongs to the answer and needs to survive.
Compare the slopes separately. A character orientation that follows the left side of one roof can cross into another roof if you carry it along unchanged.
Assign a region to each partner, then inspect the centre together. Clear ownership reduces the chance of both players cutting into the same narrow valley.
Remove safe excess before approaching the roofs
Start where the purple material is clearly outside the target. A broad cut can help reduce that excess, provided the overlap stays away from the roof tips.
As the cutting area approaches a dotted slope, stop and realign. Use a straight body boundary oriented alongside the line you want to preserve.
- Trace the skyline from one outside edge to the other.
- Clear accessible excess away from the target.
- Choose one slope and align a useful cutting boundary.
- Cut deliberately, then inspect the remaining edge.
- Repeat for the other slope of that roof.
- Recheck the neighbouring valley before moving to the next roof.
Do not expect a single tool orientation to match all the angles. Rotate between sections and inspect the overlap before acting.
Treat the valleys as precision sections
The low points between roofs are easy to damage because two different slopes meet there. Remove unwanted paper toward that meeting point gradually.
Keep the nearby roof tips in view while aligning. A deep cut that clears the valley’s outside paper can also remove part of a neighbouring slope if its overlap is too wide.
If your current body is too broad for the working area, reshape the cutter for a smaller controlled overlap. Test the shape in position before committing to the next cut.
| Mismatch | What to inspect |
|---|---|
| Purple remains above a roof | Alignment with that roof’s individual slope |
| Central peak looks flattened | Missing target paper; inspect the board restart control |
| Valley becomes too deep or too wide | Whether the cut crossed a protected boundary |
| Outside wall remains oversized | Its vertical dotted edge |
| Gauge is incomplete near the end | Every tip, valley, outer side and outside patch |
Finish with a perimeter check
Inspect the skyline from left to right after the broad work is done. Check all three peaks and both valleys rather than focusing only on the tallest roof.
A correct central peak does not compensate for a damaged lower roof. Likewise, a neat upper profile still needs the correct outside sides and bottom boundary.
Character reform rebuilds your tool. Do not assume it repairs the separate target sheet. If essential roof paper is gone, inspect the current board restart control before continuing.
The Paper Skyline chapter starts at 15:10. Make the Cut includes a separate two-peak outline, while Paper Steps uses right-angle changes in height.
FAQ
How many roofs are in this target?
Paper Skyline asks for a three-roof profile. Read your current dotted outline before planning the cuts.
Should I remove all the purple sheet?
No. Preserve the paper inside the skyline outline and remove material outside it.
Why is the central roof not enough?
The full profile includes the lower roofs, valleys and outside edges. Check every section against the target.
How should I approach a narrow valley?
Align one slope at a time and reduce the overlap near the meeting point. Protect both neighbouring roof boundaries.
Can reforming restore a flattened roof?
Do not assume it repairs the sheet. Reform changes the character; inspect the board restart control when required target paper is missing.