When I started climbing in Singapore around 2005, I was sixteen or seventeen, and the gym looked nothing like it does today. The wall was just covered in holds. Hundreds of them. No tape, no colour coding, no grades. You walked in, looked up, and had to invent your own route — or watch someone else climb theirs and try to remember the sequence. If you forgot where the next hold was as it usually happens when you are anxious or tired, you came down and started again.
That was the spray wall era. Or more accurately: every climbing gym was essentially a spray wall.
Looking back now, with a few climbing outlets of my own and an investment in a few more, I can see how much has changed — and how much of that change has been the quiet migration of cognitive load from the climber to the gym.
Three stages
The cleanest way to frame what happened is this: indoor climbing went from self-authored to setter-authored to software-assisted.
In the self-authored era, the climber did almost all the work. You read the wall. You invented the line. You memorised the sequence. You estimated your own difficulty. The gym was a training facility that provided surfaces; you were expected to provide everything else.
Setter-authored climbing arrived with tape. A coloured strip next to a hold meant this is the route, and the chaos of the dense wall resolved into legible problems. Tape later gave way to chromatic setting — the holds themselves carried the information. Red holds form the red route. The grade is on a placard at the start. No memorisation required, no interpretation, just follow the colour.
Software-assisted climbing is where we are now on the training side. MoonBoard, Kilter, Tension — standardised hold layouts, app-based problem libraries, LEDs that light the sequence for you. The app tells you what to climb, the wall tells you where to go, and the community tells you how hard it is.
Each stage took something off the climber’s plate and put it onto the operator’s.
Why it happened
The common explanation is that this was market response — beginners need cleaner walls, tired climbers need easier reading. That’s true but incomplete. A few less-obvious drivers:
Turnover. Setter-authored climbing creates a refreshable product. A reset every two to four weeks pulls members back to try new problems. A static spray wall doesn’t. This is probably the single biggest commercial reason mainstream gyms moved away from dense walls, and why the spray wall got displaced from the main floor to a dedicated training corner — if it survives at all.
Communal legibility. Graded routes create shared vocabulary. “Did you try the new V4 on the overhang?” is a sentence that works in a chromatic gym. It doesn’t work on a spray wall, because my V4 and your V4 aren’t the same problem. Setter-authored climbing is easier to talk about, easier to film, easier to share. This matters more in the Instagram era than it did in 2005.
Beginner onboarding. V0 to V1 to V2 is a visible progression ladder. Spray walls can’t onboard beginners because they presume the climber already knows how to read movement. For a commercial gym, losing the beginner pipeline is fatal.
Liability and consistency. Setter-authored routes let the operator control the movement, test the holds, present known difficulty. Spray walls distribute authorship — and with it, dispute and injury risk — back to the climber. That’s not incidental.
Coordination as a genre
Hold design changed alongside the setting style. Older spray walls were dense and rock-mimicking — small to medium holds packed tightly, the shapes suggesting granite or limestone. You couldn’t do coordination moves on that kind of wall because there is no single hold to aim for; the wall is just textured surface area.
Macros and volumes changed that. Big three-dimensional shapes, spaced far apart, create the geometry for dynamic coordination movement — the all-points-off paddle, the running dyno, the comp-style jump-to-a-volume. This movement genre didn’t exist as a category twenty years ago. It exists now because hold design made it possible, and because competition climbing made it aspirational.
What this also means: modern indoor climbing is drifting further from outdoor rock. Granite doesn’t have volumes. Limestone doesn’t have paddle holds. A climber who has only trained on modern setting is strong on plastic but often plateaus at outdoor grade transitions, because the skill of reading dense, ungenerous rock has never been rehearsed. Indoor climbing is no longer training for rock. It has become its own sport, with its own movement vocabulary, and its own athletes who may never climb outside at all.
Revealed preference
You can see how deep this shift goes by looking at modern gyms that still provide spray walls. Many do. A spray wall tucked into a corner or a side room is a common feature — a nod to the old training tradition, or a concession to the strong climbers who might want one. But watch the floor on any given evening. The coloured routes are crowded. The training boards have a queue. The spray wall sits mostly empty, used briefly for warm-ups or by one or two regulars who know how to work it.
Operators didn’t stop building spray walls because nobody would use them. They built them, watched them sit idle, and drew the obvious conclusion. Even the climbers who theoretically benefit most from open-ended training gravitate toward the legible product when it’s available. The spray wall didn’t die because gyms killed it. It became niche because climbers voted with their feet.
The board compromise
Training boards sit in an interesting middle position. A MoonBoard, Kilter or Tension is functionally a spray wall — dense, standardised, no grade markings on the wall itself. But the app layer restores everything that makes chromatic setting satisfying: grades, community voting, shared problems, lit sequences.
Boards give you the producer-density of the old era underneath a consumer-interface layer. That’s why serious athletes use them and most casual climbers don’t or can’t. The density is still there; the demand for patience and improvisation is not.
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