The beloved sprite-stack editor just got its biggest update: Pixel Perfect previews, glTF export, and 100+ bugs squashed.
SpritePile 2.1.0, the voxel and sprite-stack modeling tool by Fern Nigro, shipped this week alongside a 50%-off launch sale running October 6–13, 2026. The preview window has been rebuilt around what sprite stacking is actually for: showing you the exact chunky low-resolution look your model will have in a game.
What shipped this week
The announcement went live on Steam this week as a developer post for app 1757120, titled “SpritePile 2.1 is out: the low res preview is back, plus glTF and MagicaVoxel.” [Steam announcement] The developer's itch.io page shows the release refreshed on October 8, 2026. [itch.io page]
Under the hood, 2.1 is a rebuild on the newest GameMaker long-term-support engine and runtime — which is where much of the stability comes from. Your project files .spp are unchanged: everything you made still opens, and files saved by 2.1 still open in older versions.
Official SpritePile 2.1 announcement art by Fern Nigro, via the Steam news post (Oct 2026). Retrieved Oct 10, 2026.
What is sprite stacking, anyway?
If you are new to the tool, the name hides the trick. Sprite stacking is a technique where you draw several flat 2D pixel slices — top view, bottom view, and the cross-sections in between — and pile them up vertically. Render the pile from a tilted camera angle and the flat layers read as a 3D object: fake 3D built entirely from 2D pixel art, no polygons involved.
SpritePile is the dedicated editor for this workflow. You paint slices the way you would paint sprites in Aseprite, and the tool assembles them into a voxel model you can orbit, light, and export. It is the same idea that powers the chunky trees, buildings, and characters in many retro-styled indie games.
Illustration created by PixKit: four 2D pixel slices stacked vertically read as a 3D object when rendered at an angle.
Pixel Perfect preview: the headline feature
The rebuilt preview can now draw your stack at its real pixel size and scale it up with zero smoothing, so what you see is exactly the chunky low-resolution look the model will have in a game. Zoom goes up to 32x, which makes tiny models in the 32×48 range easy to inspect. A new pixel-scale button (1x to 4x) controls how many preview pixels are rendered per model pixel, and GPU texture smoothing is now always off for both the 2D and 3D previews.
Why does that matter? Any GPU will happily “help” by bilinearly filtering your sprites when they are scaled — the edges melt into a blurry gradient. That looks fine for photos and terrible for pixel art, where every hard edge is a deliberate choice. Pixel Perfect mode is the nearest-neighbor, integer-scaled honesty of showing each model pixel as a crisp block. (We went deep on why integer scaling keeps pixels crisp in nearest-neighbor integer scaling.)
Created by PixKit based on the official SpritePile 2.1 announcement (Steam news, Oct 2026): pixel scale 1x-4x, zoom up to 32x, GPU smoothing always off.
The preview got more than pixel honesty. It is bigger by default, carries a camera readout (X, Y, zoom), offers rotatable/pausable turntable views, and — in a fix that will make dark-theme artists smile — lets you set separate preview and canvas background colors, because “black models are finally visible.” The 3D view now lives inside the preview panel instead of taking over the whole editor: hold the mouse to orbit, fly with WASD/Space/Ctrl, drag the sun around with the right button, and the model rebuilds live as you keep drawing.
glTF and MagicaVoxel: the pipeline angle
The second headline is export. SpritePile 2.1 can now write glTF binary (.glb) with vertex colors — meaning each vertex carries its own RGB value, so the model needs no texture image at all. That drops straight into Blender, Godot, Unity, and the web. It also gains MagicaVoxel (.vox) export and import, with palette preserved on the way back in. Models are limited to 256 voxels per axis and 255 colors (beyond that, excess data is skipped and you are told), and every exporter now shows an estimated file size in its tooltip before you commit.
The new example project bundled with 2.1, from the official announcement (Steam news, Oct 2026). Retrieved Oct 10, 2026.
Everything else in 2.1
The changelog reads like a greatest-hits of user requests. Here is the condensed tour:
Editing that behaves
Copy and paste selections within a layer or across layers (Ctrl+C / Ctrl+V). Line, rectangle, circle, and selection tools now draw on hold-drag-release. Click outside a selection to clear it.
Palette upgrades
The palette editor gains Hue, Saturation, and Value boxes synced with RGB, and the color picker now adds colors that are not in your palette yet — imported art is far easier to work with.
Lighter and safer
Idle CPU use is a small fraction of what it was; the preview only redraws when something changed. Closing with unsaved work now asks first, and custom keyboard shortcuts are remembered between sessions.
Bug-hunt bonanza
Damaged settings files no longer block startup, broken .spp files no longer crash and swallow your open project, and drawing-tool memory leaks are gone — part of the 100+ fixes.
What it means for your workflow
If you make pixel art for games, the practical read is simple. For 2D projects, design your stacks in SpritePile and export sprite sheets or PNG sequences as before — now with a preview you can trust at every zoom level. For 3D engines, the vertex-color .glb export is the new fast lane into Godot, Unity, and Blender with no texture plumbing. For MagicaVoxel users, the two-way .vox bridge means you can bounce a model between the tools, palette intact, instead of committing to one editor.
The 50% launch discount runs through October 13, 2026 on [Steam], which the developer frames as thanks to everyone who waited through four years of fixes. Whether or not you buy, the 2.1 changelog is worth reading as a case study in what a mature niche tool looks like: fewer new toys, more trust — pixel-perfect previews, honest file-size estimates, and a hundred small papercuts finally gone.