A Better UV Check: Consistent Texel Density Before Bigger Textures

When one prop looks crisp and the next looks soft, increasing every texture to 4K is an expensive first guess. I would check how much texture detail each surface actually receives before adding more pixels.

For that job, Texel Density Checker is a useful Blender add-on to evaluate. This is a recommended workflow, rather than a claim that I used this particular extension on my earlier projects.

What the tool helps answerThe developer's official extension page lists density calculation, UV rescaling to a target, copying density between objects, and checker or vertex-colour visualization. One of its simplest capabilities is “Copy Texel Density from one object to others”.

Those operations make it easier to compare assets against an intentional baseline. The point is not to make every UV island the same size. A larger real-world surface needs a different UV allocation to maintain the same density.

The three-pass check I recommend1. Establish the reference. Start with an asset that has the right scale and will be seen at a representative distance. Choose the intended texture dimensions and a density target that fits the platform and visual goal. A number without those assumptions is difficult to reuse.

2. Compare the neighbours. Apply a checker and inspect nearby assets together. Use the density tools to identify accidental differences. Then review the actual texture, because consistent density does not guarantee that a label is readable or a pattern is convincing.

3. Return to the engine. Check the exported model at its intended distance, with the real import settings and mip behaviour. A Blender viewport is a useful diagnostic view, but the final experience decides whether the allocation works.

The myth: everything must have identical densityConsistency is a baseline, not a law. A control panel that the user must read may deserve more detail than an inaccessible back panel. The important distinction is intentional priority versus accidental inconsistency.

I would document those exceptions rather than silently changing the target. That keeps an asset library coherent without spending the same texture budget on surfaces that serve different purposes.

A small trick before packingSet the density direction first, then pack and inspect padding. If the layout no longer fits, treat that as a budget decision: reduce density, split the texture set where appropriate, or reconsider the asset's requirements. Simply shrinking random islands until everything fits hides the compromise.

Also keep surface-texture UVs and lightmap UV requirements separate. A density checker does not automatically validate lightmap overlap, padding or the engine's selected channel. I would inspect those explicitly.

The benefit of this workflow is a clearer question: which surface actually needs more information? That is a better starting point than making every texture larger and hoping the inconsistency disappears.

Tool recommendation · 7 October 2026. Feature details come from the extension developer; the workflow above is my proposed evaluation approach.