How did skiing, surfing, and skateboarding influence snowboarding?

Snowboarding is a winter sport that emerged from the convergence of skiing, surfing, and skateboarding. Each sport contributed uniquely to its development:1

• Surfing: The fundamental concept of "sliding sideways" on snow was directly inspired by surfing. Early prototypes, such as the "Snurfer," were explicitly designed for "surfing on snow," and the sport’s early pioneers included individuals with surfing backgrounds who helped refine board designs.2
• Skateboarding: Skateboarding profoundly influenced the culture, style, and technical maneuvers of snowboarding. The freestyle discipline, which focuses on performing tricks on rails, jumps, and half-pipes, has its roots in skateboarding techniques. Furthermore, the nonconformist, youth-oriented subculture associated with skateboarding—including its fashion and individualistic approach—was adopted by early snowboarders, helping to distinguish the sport from traditional skiing.342
• Skiing: While snowboarding differentiates itself from skiing by having riders stand perpendicular to the board without poles, it inherited the basic premise of navigating snow-covered slopes. Over time, the influence became reciprocal, as modern skiers have drawn inspiration from the tricks, attire, and performance styles of freestyle snowboarders.154