Parallax Loop Studio for Aseprite

Menu, title and level backgrounds need a looping scroll that really loops. Parallax Loop Studio turns your stacked background layers into one seamless, tagged scroll animation: set a speed and direction per layer, and it works out the exact frame count after which every layer is back at its start. Pixel-exact wrap-around, no blur, no new colours.

• Speed and direction per layer: left, right, up, down; any decimal speed (0.5 px = alternating 1,0 px steps)
• Loop solver: the exact, shortest frame count after which every layer returns to its start; uses each layer's own repeat length (a layer tiling every 24 px loops in 24 frames, not the full width)
• Snap speeds: nudges speeds by 1 or 0.5 px so the loop gets strictly shorter, when one exists
• Fit to N frames: type the length you want; every layer gets the speed that makes whole laps in exactly that many frames
• Seam report: per layer, how many rows or columns differ across the wrap seam, so you see which layer is not tileable
• Presets: Forest 4-layer, City night, Clouds slow (pairs with the Pixel Sky output)
• Frame 1 stays as drawn, loop tagged scroll, frame time set, one Ctrl+Z undoes everything; RGB, indexed and grayscale, groups, hidden layers stay still, Aseprite 1.3+

Tested in real Aseprite 1.3.18 (headless): every frame of every layer equals the exact wrap roll of the source, the frame after the last equals the first, the loop length equals a brute-force minimum, the seam count equals a brute-force count, indexed sprites stay inside their palette.

Honest note: speeds are whole pixels or exact fractions per frame, so a long loop (a 320 px layer at 1 px needs 320 frames) is a fact of the maths; use Snap or Fit to frames, or accept steps of several pixels. The seam report only compares the first and last column or row. Commercial use of the resulting artwork is allowed; no credit needed.

Try the free Lite version first: Parallax Loop Studio Lite.

More Aseprite tools by the same author: Appear & Vanish FX, Hit Reaction Kit, Idle Motion Maker, Smear & Squash Studio, Selective Outline Studio, Pixel Sky & Cloud Generator (makes the sky layers).

Disclosure: the code was written with an AI coding assistant; the loops are plain pixel maths, no image AI.