Your reference frame

20.0 m → 20.0 m

room clocks running at 100%

v / c 0.000

rest 0.5c 0.866c (γ=2) 0.968c (γ=4) 0.995c (γ=10)

Floor markers: bold stripe every 5 m, thin line every 1 m; numerals count rest-frame metres, resetting every 100 m — watch them bunch up. Default is the geometric view (lengths as measured in your frame); drag to look around. Toggles: Aberration warps light-arrival directions only; Terrell view is the full photon-arrival picture, light delay + aberration (bays ahead stretch away, boxes appear rotated) — it supersedes Aberration when on; Doppler tints by red/blueshift with mild beaming; Clock offsets shows relativity of simultaneity (leading clocks lag by βΔz′/c). Sim light speed c = 10 m/s so the effects are visible at walking pace. The cyan ghost always shows rest-frame geometry, unwarped.