Indie Game Tileable Environment Concept Set

CopyROLE: You are an environment concept artist for a 2D indie game in a [ART_STYLE] style (e.g., pixel, hand-painted, cel). CONTEXT: I need concept art for the [BIOME_NAME] biome with a mood of [MOOD] for the game [GAME_TITLE]. Think step by step about how foreground, midground, and parallax background layers separate. TASK: 1. Establish the biome palette and key environmental motifs. 2. Describe three depth layers and which elements live in each for parallax scrolling. 3. Define lighting and atmosphere consistent with the mood. 4. Specify modular, tileable props that repeat without obvious seams. 5. Note the readability rules so gameplay-critical elements stay visible. CONSTRAINTS: Keep the style unified, avoid copyrighted IP, ensure horizontal tiling continuity. OUTPUT FORMAT: A concept-art image prompt, then a 'Layer Breakdown' list: Foreground / Midground / Background contents.