1

HOME/USEFUL GUIDES/GUIDE TO 3D FILE FORMATS/ZTL FILE FORMAT EXPLAINED

ZTL File Format Explained

The ZTL format is the proprietary ZBrush Tool file format used by Maxon ZBrush. It is primarily used to save a selected Tool, including its SubTools and sculpting-related model data.

	Icon	Extension	Original Software	Year	Primary Industry	Geometry	UV Maps	Textures	PBR	Animation	Rigging	Open Use
		.ZTL	ZBrush	1999	Digital Sculpting VFX Game Development	Mesh	✔	✔	✔	–	–	–
ZTL File Format Details What It Stores It stores ZBrush Tool data such as high-resolution polygon geometry, SubTools, subdivision levels when present, PolyPaint, masking, layers, UV and texture-related data, and Tool-specific settings such as FiberMesh-related data when used. Primary Use Cases Saving high-fidelity digital sculptures for iterative work. Moving detailed assets between different ZBrush projects. Storing master sculpts with intact subdivision levels. Distributing highly detailed 3D printable models. Strengths Supports ZBrush workflows with high polygon counts and multiple SubTools. Preserves Tool and SubTool sculpt data, including subdivision levels when present. Often more suitable than OBJ or STL for keeping ZBrush-specific sculpting data editable. Limitations Proprietary format restricted almost exclusively to ZBrush. Does not store the full ZBrush project session, canvas document information, timeline animation, or global project settings saved in ZPR files. Common Software Support Primarily supported by Maxon ZBrush and ZBrushCore. External workflows typically require exporting to interchange formats or using ZBrush bridge workflows such as GoZ, rather than opening ZTL files directly in standard DCC tools.

Browse ZTL Assets on RenderHub