Sonic Mania Sprites Sonic Amino PT~BR© Amino

Complete - Orbinaut Framework: Green Hill Pack

ArtStation - Green Hill 3D Redesign

Sega Genesis / 32X - Sonic the Hedgehog - Green Hill Zone Objects - The Spriters Resource

The Textures Resource - Full Texture View - Sonic Adventure 2 - Green Hill Zone

sonic sprite test 2 : r/SonicTheHedgehog

User blog:SalaComMander/SalaComMander's first sprite comic, Sonic Wiki Zone

Sonic Mania Armless Sonic + More Green Hill

Sonic The Hedgeblog — In early 'Sonic 1′ screenshots the Green Hill Zone

The VG Resource - Dolphman's sprite library of customs & edits

Sonic 1 Green Hill Canvas Wrap