OxyBrush 4.0.0-beta.1

[crisprintsstuff]

OxyBrush 4.0.0-beta.1 makes alphas captured from view sharper (up to 4096 px), saves them with your project, and lets you export any alpha to edit in a 2D app. A new project started from File > New > Cube no longer has open seams. OxyBrush now uses semantic versioning: this is the first beta of 4.0.0 (it follows 3.0.8-beta). Betas count up as 4.0.0-beta.2, -beta.3… until 4.0.0 is stable; the in-app updater orders them correctly. It's still a beta: please report issues (or use Help > Report a bug… in the app).

Downloads

Platform	File
macOS 11+, Apple Silicon and Intel (universal)	OxyBrush-4.0.0-beta.1-macos-universal.dmg
Windows 10/11 x64, installer	OxyBrush-4.0.0-beta.1-windows-x86_64-setup.exe
Windows, portable (includes oxybrush-cli.exe)	OxyBrush-4.0.0-beta.1-windows-x86_64-portable.zip
Linux, Flatpak	OxyBrush-4.0.0-beta.1-linux-x86_64.flatpak → flatpak install --user OxyBrush-4.0.0-beta.1-linux-x86_64.flatpak
Linux, portable (includes oxybrush-cli)	OxyBrush-4.0.0-beta.1-linux-x86_64.tar.gz

Verify downloads with SHA256SUMS.txt.

First launch:

• macOS: open the .dmg, drag OxyBrush to Applications, and open it. If macOS shows an untrusted developer warning, go to System Settings > Privacy & Security, scroll down and click Open Anyway.
• Windows: SmartScreen warns about an unknown publisher: click More info, then Run anyway.

New

• Capture from view at up to 4096 px. A size picker next to Capture from view offers 256, 512, 1024 (the new default; it used to be a fixed 256), 2048 and 4096 px, so captured alphas have smooth edges instead of blocky ones. Capturing is also much faster: 4096 px takes about a second on a 1.3-million-triangle sculpt, and the app stays responsive while it works. The size you pick is remembered.
• Alphas are saved with the project. Alphas you capture or load from an image are stored in the .oxb and come back when you open it. A new alpha counts as unsaved work, so you're asked to save before closing.
• Export alpha… (in the Alpha section, or the command palette) saves the selected alpha as a 16-bit grayscale PNG, to touch up in a 2D app and bring back with Load image….

Fixed

• File > New > Cube made a cube with open seams. Some points where two faces met weren't joined, so the cube shaded and sculpted badly along its edges; a cube added with Pieces > Add was fine. New cubes are now closed. A project already started from the broken cube keeps its seams; a voxel remesh repairs them.

See the changelog for details.

Project files

Projects from 3.0.8-beta open unchanged. Alphas are saved in a new section; older versions skip it and open the project without them.

Known limitations

• Not yet tried by testers: everything above. A 4096 px alpha adds up to about 32 MB to a project before compression; how much it compresses depends on the image.
• Alphas carry over between projects in one session: alphas from a project you closed stay in the list and are saved with the next project too.
• macOS shows a "?" instead of the OxyBrush icon for some testers. On a clean macOS 26 machine the app and .oxb files show the right icon, so this is most likely macOS's icon cache: move OxyBrush to Applications, eject the disk image, remove old Dock entries and open it from Applications; if needed, log out and back in.
• Import scaling goes by size alone, so an import that really is meant to be 10× the scene gets scaled too: press Undo once to keep its original size.
• The box and lasso hide/show tools don't follow symmetry yet (masking does).
• Dynamic detail is smooth up to a few hundred thousand triangles and lags behind the brush around a million.
• The Blender bridge add-on still hasn't been run inside Blender.
• macOS is not notarized; pen pressure and touch gestures are untested on many tablets.

OxyBrush is an independent project, not affiliated with any commercial sculpting software vendor.

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This discussion was created from the release OxyBrush 4.0.0-beta.1.