How to Set Up Motion Blur in Blender Cycles: A Step-by-Step Guide

What will you learn in this guide?

By default, Blender renders animations as a sequence of still images. Fast-moving objects, however, can produce blur in the direction of motion, as they would in footage from a real camera. Cycles’ motion blur settings let you determine the time interval covered by this effect and how it is distributed across the image frame.

This guide covers how to use shutter position relative to the frame, shutter duration, and rolling shutter options. It also explains simulation, camera, and render-device considerations when evaluating these settings for architectural animations. The steps here are a translation and adaptation of information from Blender’s official manual.

Requirements

• Blender and the Cycles render engine. The source manual is the online documentation for the current interface; it does not specify a particular Blender version number.

• An animated scene with motion is needed to evaluate motion blur. For example, you can compare results using a camera or object whose position changes during the animation.

• The sources do not mention any account or subscription requirements.

• You can select CPU or GPU Compute as the render device. According to the manual, using a GPU can significantly affect render performance, but availability and limitations depend on the selected backend.

Setting up motion blur

1. Find the Motion Blur section in Render settings

Open the Motion Blur section in the Cycles render settings. Motion blur is not limited to movement in scene objects; camera movement can affect the image as well. First check how the animation looks without blur. This makes it easier to compare the effects of subsequent setting changes.

For architectural visualization, this check is especially useful in scenes where conveying motion is important. For example, you can evaluate the effect of blur during an animated camera move. However, the manual does not specify a particular scene type or recommended value. Test the settings against the motion in your scenes, and avoid assuming there is one correct value for every scene.

2. Choose the shutter position

The Position setting determines when the shutter opens relative to the current frame. There are three options:

• Start on Frame: The shutter begins opening at the current frame.

• Center on Frame: The shutter is fully open at the current frame.

• End on Frame: The shutter is fully closed at the current frame.

These options change how motion blur relates to frame timing. For a camera move or an animation with a moving object, try each option separately and compare the same frame. This lets you see which part of the motion the current frame represents. Rather than judging the setting from a single image, check the neighboring frames in the animation as well.

3. Set the Shutter duration

The Shutter setting defines the time between the shutter beginning to open and closing completely, measured in frames. According to the example in the official manual, a shutter duration of 1.0 produces blur over one frame of motion.

When changing the value, consider the nature of the motion in the scene. The duration affects the time interval covered by the blur, so it is important to inspect the result at different points in the animation. The source manual does not recommend a shutter value for any particular type of animation. Therefore, do not apply a numerical prescription that is not in the source for architectural camera moves, object animation, or any other scene.

To compare changes, keep the same camera view and frame, then evaluate the previous and new renders side by side. The goal is to see whether the blur makes the motion easier to read and whether it obscures architectural elements more than intended.

4. Explore the Rolling Shutter option

The Rolling Shutter setting adds a rolling shutter effect to motion blur. None disables the effect, while Top-Bottom applies it from the top of the image to the bottom. Rolling Shutter Duration controls the balance between a pure rolling shutter effect and pure motion blur. According to the manual, a value of zero corresponds to a pure rolling shutter effect, while a value of one corresponds to pure motion blur.

Change this setting only if your scene needs this type of effect. To see whether the top and bottom of the image are affected differently in an architectural animation, render the same frame with different options. The sources do not define an ideal duration or rolling shutter value for specific scenes.

5. Check the Shutter Curve and object settings

Shutter Curve defines how the shutter opens and closes. The X axis represents time, while the Y values represent the shutter opening: zero means fully closed, and one means fully open. The official manual states that the default mapping is set so the shutter opens and closes abruptly.

Each object may also have its own motion blur settings. These are in the Object section of the object’s Properties tab. If the result differs from what you expect, check the affected object’s settings as well as the render-level settings.

6. Check simulations and the render device before rendering

If the scene contains particles or other physics systems, bake them before rendering. The official manual warns that simulations that have not been baked may not produce accurate or consistent motion blur.

You can choose CPU or GPU Compute in the render settings. CPU is compatible with Cycles features. GPU Compute depends on the selected compute backend and devices; GPU rendering may have different limitations from CPU rendering depending on the backend. So don’t choose a device based on speed expectations alone: also check that the features used in the scene are compatible with the selected method. Since the sources provide no specific hardware models or performance measurements, it is not possible to recommend a device here.

What does this mean for architectural and visualization workflows?

Motion blur can be used in architectural animations to manage the effect of movement on the image. For sequences involving camera movement, shutter position and duration help control which time interval is represented in the frame. However, the sources do not guarantee results for any specific architectural workflow; decisions should therefore be based on scene-by-scene comparisons.

For architecture and interior design studios, the main considerations fall into three categories: animation timing, simulation consistency, and render-device compatibility. If you use particles or a physics system, don’t skip baking. When using GPU Compute, check the limitations of the selected backend. Also note that camera motion blur does not work with an orthographic camera, and movement of lights in world space is not taken into account.

Common mistakes

• Rendering without baking the simulation: Complete the bake before rendering when using particles or other physics systems; otherwise, motion blur may not be accurate or consistent.

• Expecting camera blur with an orthographic camera: According to the official manual, camera motion blur does not work with orthographic cameras.

• Treating light movement like camera movement: Movement of lights in world space is not taken into account for this effect. Moving the camera and lights together can cause incorrect motion blur.

• Overlooking object-level options: Each object has its own motion blur settings; if the result is unexpected, check the Object section too.

• Assuming GPU will work without issues in every case: GPU rendering limitations may depend on the selected backend. Check the required features and device compatibility.

Next steps

Start with a simple test scene containing a single moving object or camera. Compare the Position options on the same frame, then change the Shutter duration to see how it affects the motion interval. If you need rolling shutter, test the None and Top-Bottom options separately. Finally, make sure simulations in your actual project have been baked, object settings have been checked, and the render device is compatible with your scene.

This approach helps you identify which setting produces which result. Rather than treating values not specified in the manual as universal recommendations, evaluate the animation frames and the selected render device together.

Sources and license

This guide is adapted into Turkish based on content from Blender’s official Motion Blur and Render Settings manuals. Both sources are published under the CC BY-SA 4.0 license.