CONCRETE — The climbing wall that is planned ... first climbing holds installed. The holds, which climbers will use to scale the silos, are gray and rock-like in order to match the aesthetic ...

For the latter, many have turned to 3D printers to create more rock-like climbing grips but plastic doesn’t tend to behave the same as rock unless you do what [Giles Barton-Owen] did and ...

After the routes, rock features and climbing holds were modeled in 3D, the researchers used rapid prototyping and molding and casting methods to make climbing holds like those at indoor climbing gyms.