An endless low-altitude flight down a neon canyon: an fbm heightfield is sphere-marched per pixel with the camera flying forward through static world space, so integer-spaced grid lines drape over the terrain and flow toward you while the valley floor stays a flat magenta road and the flanks rear up into cyan wireframe mountains. Exponential fog dissolves the far grid into a vaporwave horizon where a banded gradient sun hangs low. Scrolling throttles the flight speed, the cursor banks the camera into a roll, and holding the pointer floods the grid with an afterburner glow.