Texture Painting in Blender: A Step-by-Step Guide from UV Setup to Saving Images

What you’ll learn in this guide

This guide covers the basic workflow for painting a texture onto a model in Blender: preparing the model’s UV map, using or creating an image for painting, working in Texture Paint mode, and saving the result. You can paint directly on the model in the 3D Viewport or on the flat image in the Image Editor. When both views use the same UV texture, changes made in one also appear in the other.

This workflow can also be useful for architectural visualization models. Before adding visual detail to surfaces such as walls, façades, or furniture, check how the UVs are unwrapped and how the islands are arranged. If the UV layout isn’t suitable, the paint may not land where you expect on the model.

Requirements

Blender is the only essential software required. The source documentation doesn’t specify a particular Blender version or account requirements, so no specific version number or account conditions are given here. You’ll need a mesh to paint, a UV map for that model, and a UV texture to paint on. The texture image can be loaded from a file, created in the Image Editor, or painted within Blender.

Before you start, check the following:

• The model must have a UV map; Blender may show a warning if there is no UV layer.

• Texture Paint is available in both the 3D Viewport and the Image Editor.

• If you use an external image-editing program, reload the edited file in Blender.

• Texture changes aren’t saved automatically. Save the result separately.

Step-by-step texture painting in Blender

1. Prepare the model’s UV map

Select the object you want to paint and make sure it has UVs. If it doesn’t, you’ll need to unwrap the model. Blender’s UV tools include unwrap methods such as Angle Based, Conformal, and Minimum Stretch. For architectural or mechanical objects, Smart UV Project is another option: it groups surfaces according to their angles, splits them along suitable edges, and arranges them in the UV space.

In Smart UV Project, Angle Limit affects when surface groups are split. A lower limit can create more small UV islands; a higher limit can produce fewer islands while increasing the chance of distortion. Island Margin sets the spacing between islands. Before painting, check the UV Editor for overlapping islands and excessive stretching.

2. Choose the texture image

You can load an image file as a UV texture, create a new image in the Image Editor, or paint on an existing texture there. The Blender manual notes that square images with dimensions that are powers of two can be fast and responsive to work with in Texture Paint; examples include 256×256, 512×512, and 1024×1024. These aren’t required dimensions, but a performance recommendation.

Keeping the UV texture image in a separate folder from files used for other purposes can help keep things organized. If the texture edited in the Image Editor is used in the model’s material, you can also monitor it in the 3D Viewport. To do this, set one area to a 3D Viewport displaying the texture and another to an Image Editor with the relevant image open.

3. Switch to Texture Paint mode

You can enable the Texture Paint workspace or switch to Texture Paint Mode from the mode selector in the 3D Viewport header. To work in the Image Editor, switch the editor to Paint mode. When Texture Paint is active, the cursor functions as a brush and the relevant painting tools become available.

Painting in the 3D Viewport lets you apply brush strokes directly to the mesh surface through its UVs. In the Image Editor, you work on a flat canvas; Blender maps the image onto the model according to its UV coordinates. Changes made in one view appear in the other. To move or edit UV coordinates, use the UV Editor rather than the painting area.

4. Set up the brush texture and mapping

Adding a texture to the brush controls how the brush color appears. A Texture Mask controls the strength of the brush’s effect. The source manual recommends Area Plane or View Plane mapping for the most commonly used behaviors. Area Plane projects the brush texture along the surface’s local normal to help reduce stretching at right angles. View Plane uses the current view angle and can be useful for projection painting.

Use Stencil mapping if you want to project an image onto a surface like a stamp. Painting is applied only within the stencil boundaries. Choose the mapping type to suit the image and surface, then check for texture stretching and transitions between surfaces in the 3D Viewport.

5. Paint, check, and save the image

Once you’ve set the brush and color, paint the model in the 3D Viewport or the image in the Image Editor. Check the edges of the texture islands when painting across seams. The source documentation notes that painting on overlapping UVs isn’t generally supported, but problems can occur when a stroke paints multiple faces that share the same texture.

When you’re done, use Save Image or Save Image As in the Image Editor. An asterisk in the image header indicates that changes haven’t been saved. You can save the image as a separate file; there’s also an option to pack it into the Blender file. If you made changes in an external program, reload the image in Blender.

Common mistakes

• Starting to paint without checking the UV map: If there’s no UV layer, prepare the UVs before painting.

• Overlooking overlapping islands: A brush stroke can produce unwanted results if it affects multiple faces that use the same texture.

• Assuming the texture saves automatically: Blender doesn’t write changes to disk on its own; save the image from the Image Editor.

• Trying to paint a hidden surface in perspective view: Surfaces partly behind the visible area may not be paintable. The source lists zooming out or switching to orthographic view as solutions.

• Ignoring failed strokes on the side surfaces of low-poly models: In perspective view, painting can fail if surface normals point away from the viewing direction. The source recommends turning off the Normal Falloff option in the stroke settings to address this.

Impact on architectural and visualization workflows

When you need custom texture details on a façade, interior furniture, or architectural element, painting directly in the 3D Viewport lets you work while viewing the model; the Image Editor provides flatter, more controlled editing on the UV layout. Smart UV Project can be used for architectural models, but the resulting island layout should be checked to make sure it suits the job. If a team uses different image-editing programs, it’s also possible to develop the texture in an external application; in that case, reload the file in Blender.

Before production, decide on texture resolution, UV island layout, and saving method based on the project’s requirements. The sources don’t specify hardware, licensing costs, or cross-application compatibility requirements. Teams should therefore test their existing Blender and image-editing workflows, especially verifying that externally edited files match the correct texture and are saved.

Next steps

Start with a simple architectural or mechanical model. After unwrapping the UVs and checking the layout, view the same texture in both the 3D Viewport and the Image Editor. Then test brush mapping and stencil use on a small sample image. If the texture is used in the material for bump or another surface property, in addition to color, check the painted result in the context of the scene. If you add an external editing program to the workflow, reload the image after each change and save the final version.

Sources and license

This guide has been adapted into Turkish using the “Introduction” (Texture Paint), “Texture & Texture Mask,” “Image Settings,” and “UV Operators” pages in the Blender Manual. The sources are licensed under CC BY-SA 4.0.