Add Native Timeline to UV/Image Editor for Frame-by-Frame Texture Painting

Add Native Timeline to UV/Image Editor for Frame-by-Frame Texture Painting

Category: User Interface / Animation & Rigging

Blender Version: 5.1+

The Problem

Blender 5.1 has no built-in timeline inside the UV/Image Editor when in Texture Paint mode.

To paint a simple frame-by-frame animated texture (like a blinking screen, a moving tattoo, or a character expression change), you currently have to:

1. Set up an image sequence in the Shader Editor
2. Paint in the 3D Viewport (Texture Paint mode)
3. Change frames in the Timeline Editor (separate window)
4. Check the result in the UV/Image Editor

This constant context-switching breaks creative flow. There is no single workspace where you can see your timeline and paint on your texture at the same time.

What's New in Blender 5.1 (And What's Still Missing)

Blender 5.1 introduced many quality-of-life improvements, including:

• UV Editor: Select everything inside any UDIM tile; new edge opacity slider
• Graph Editor: Non-destructive smoothing modifier for animation curves
• Shape key evaluation: Up to 4x faster for complex meshes
• Eevee: New raycasting shader for NPR effects
• Cycles: GPU performance improved 5-10%

However, none of these updates address the missing timeline in the UV/Image Editor. Texture paint workflows remain unchanged.

The Feature Request

Add a dedicated timeline/dopesheet panel directly inside the UV/Image Editor when in Texture Paint mode.

This would allow artists to:

• Scrub through image sequence frames while painting directly on a 3D model
• See previous/next frames as semi-transparent overlays (onion skinning)
• Keyframe and preview animated textures without leaving the Texture Paint workspace
• Paint frame-by-frame animations directly onto 3D surfaces

Why This Matters

This feature unlocks an entire category of 2D/3D hybrid animation workflows that are currently difficult or impossible in Blender:

Use Case	Current Pain Point
Animated character tattoos (Moana-style)	Tattoo animation requires external 2D software or hacky workarounds
TV screens / digital displays	Animated glitches, scrolling text, or frame-by-frame effects require manual sequence management
Magical effects (runes, spell circles)	Frame-by-frame control over energy textures on characters is overly complex
2D characters in 3D space	Indie developers must use Grease Pencil instead of painting directly on meshes
Stop-motion style textures	Hand-painted frame-by-frame realism cannot be achieved efficiently

Why This Cannot Be an Add-on

Adding a timeline to the UV/Image Editor requires core C++ changes , not Python scripting.

• Blender's UI structure for the UV/Image Editor ( SpaceImageEditor ) does not expose hooks for adding timeline widgets via Python
• The read-only nature of the editor's layout API prevents third-party add-ons from fundamentally restructuring it
• Onion skinning for image sequences would require changes to the OpenGL viewport rendering pipeline

This is precisely why Blender Foundation needs to implement it—the community cannot build it themselves.

What Already Works in Blender

Blender already has the technical foundation for this feature:

• Grease Pencil has a full-featured timeline with onion skinning
• Movie Clip Editor has frame scrubbing and playback controls
• Video Sequencer has timeline editing
• 3D Viewport has a timeline for animation

The UV/Image Editor is the only major editor without animation tools. This request simply brings it up to parity with the rest of Blender.

Future Roadmap Context

The Blender 2026 roadmap includes exciting features like layered textures, animation layers, and Cycles texture cache. Texture painting and baking projects are planned for 2026.

A timeline in the UV/Image Editor would complement these efforts perfectly. Layered textures become exponentially more powerful when you can animate them frame-by-frame directly on the model. Adding this feature now would align with Blender's broader investment in texture workflows.

Proposed Implementation

Minimum Viable Feature:

• A timeline strip at the bottom of the UV/Image Editor (like the 3D Viewport)
• Current frame indicator
• Play/Pause/Previous/Next controls
• Ability to scrub while staying in Texture Paint mode

Desired Advanced Features:

• Onion skinning for image sequences (overlay previous/next frames)
• Auto-keyframing when painting on a new frame
• Frame management (duplicate, delete, insert blank frames)
• Image sequence baking (convert painted frames to video or texture atlas)

Call to Action

Upvote this feature request if you have ever:

• Animated a character's tattoo, face texture, or screen display frame-by-frame
• Wanted to paint directly on a 3D model while seeing your animation playback
• Felt frustrated jumping between editors to make a simple texture animation
• Believed the UV Editor should have the same tools as the rest of Blender

Blender 5.1 brought performance improvements and quality-of-life fixes. Let's make Blender 5.2 or 5.3 the version that finally brings the UV/Image Editor into the modern animation workflow.