Why Is Blender's Motion-Vector Pass Unavailable After I Enable Motion Blur for My Product Animation?

Identify where the motion blur is supposed to happen

A rotating product animation can obtain motion blur during rendering or through a later compositing treatment that uses motion-vector information. These workflows are related but not identical.

Rendered motion blur is incorporated into the image produced by the renderer. A motion-vector pass instead records information about apparent movement that a compositor can use for supported downstream operations.

Blender's Passes documentation explicitly states that the Vector pass is disabled when Motion Blur is enabled. Therefore, requesting both in the same configuration is not a reliable way to obtain an already blurred image and an independent vector pass for subsequent adjustment.

Before changing settings, identify whether the final deliverable needs the baked appearance, the editable vector-based treatment or separate renders for comparison.

Inspect the actual pass and render configuration

Open the Blender scene and record the render engine, Motion Blur setting, enabled View Layer passes and compositor inputs. Confirm whether the missing output is specifically the Vector pass rather than a similarly named custom pass or a file channel that was not included in the export.

For a vector-based compositing workflow, evaluate a render configuration in which Motion Blur is disabled and the supported Vector pass is enabled. For a renderer-produced blur workflow, evaluate Motion Blur directly and inspect the Combined image.

Keep the camera, product movement, frame timing and geometry unchanged across the comparison. Otherwise a difference in blur could be caused by changed animation rather than the render method.

A vector-based blur treatment may not reproduce every visual effect of true renderer-integrated motion blur. Transparent surfaces, occlusion and motion boundaries deserve separate inspection.

Hypothetical rotating bottle advertisement

Hypothetical illustration—not a Blender rendering test: a bottle rotates through 90 degrees during a short animation. The editor wants a clean render and a separately adjustable blur pass for the final advertisement.

Configuration A has Motion Blur enabled and expects the blur to appear in the rendered image. Configuration B disables Motion Blur and requests the Vector pass for downstream compositing.

If the Vector pass is unavailable in A, that follows the documented incompatibility. The next action is to choose the intended blur workflow or produce appropriately separate render configurations, not to invent a missing export checkbox.

Both configurations still need product-label review. A visually attractive blur must not be used to conceal incorrect or altered label geometry.

Approve the blur where it is actually applied

Inspect stable frames, maximum-motion frames and transitions where the product enters or leaves the image. Compare the final composited result with the source animation and the approved product reference.

If the editor needs to revise blur strength after rendering, preserve the source scene and the relevant unblurred/vector data where supported. If the renderer-produced blur is approved, retain the configuration that created it and document that the blur is not an independent vector adjustment.

The existing product-motion-blur article distinguishes temporary softness from altered lettering in finished video. This guide diagnoses why a particular Blender render pass is unavailable before that finished-video review.

Record your own observations

The filled rows are illustrative examples. Use the blank row for your own files and observations.

Download the editable CSV worksheet

What the references establish

• Blender 5.0 Manual — Passes: Documents the Vector pass as motion-vector data for compositing and explicitly states that it is disabled when Motion Blur is enabled.