underpainting

Your finished art. Its story, replayed.

Turn any layered file into a process video — no recording needed.

Files deleted after 24 hours. Never used for AI training.

Common questions

Which files can I upload?
  • Photoshop — .psd, .psb
  • Layered TIFF — .tif, .tiff (saved from Photoshop with “Layers” checked)
  • Krita — .kra
  • Clip Studio Paint — .clip
  • Procreate — .procreate
  • GIMP — .xcf
  • PaintTool SAI — .sai (SAI version 1)
  • OpenRaster — .ora

The file needs at least two visible layers — a flattened export has no story to replay.

My app isn't listed — what do I do?

Export your work as a .psd (nearly every painting app can) or as .ora, keeping the layers. The video is built from whatever layers survive the export.

Is the video a real recording?

No. It is a reconstruction: a plausible replay built from the layers in your file, the way an architect's rendering shows a building. We never call it a recording, and no part of it is AI-generated — every pixel comes from your own artwork.

What happens to my file?

Your upload goes straight to storage over an encrypted connection, and both the file and the finished video are deleted after 24 hours. Nothing you upload is ever used to train AI, and only your browser can see your renders.

Anything that doesn't work yet?

SAI2 files (export as .sai version 1 from SAI2), Procreate 3D canvases, and CMYK or 32-bit documents. Adjustment and filter layers, and some masks, are skipped rather than applied — and everything skipped is listed with the detected passes in the re-render panel on the result page, so nothing disappears silently.

How is this different from recording a timelapse?

A recorded timelapse or speedpaint has to be captured while you paint. underpainting works after the fact: it reads the layers in your finished file and reconstructs a plausible painting order — a process video for art you never recorded.

Every video is a reconstruction — a process visualization built from your own layers, the way an architect's rendering shows a building. It is never a screen recording, and it is never AI-generated.