Why Is My Render Blurry in Blender?

When using Blender for 3D modeling and rendering, many users may encounter issues with blurry render images. This not only affects the final outcome but also can leave you feeling puzzled and frustrated. So, why does rendering in Blender appear blurry? This article will delve into this issue in detail and provide solutions to help you achieve clear rendering results.

　　1. Improper Rendering Settings

　　Resolution Settings

　　Blender's default rendering resolution may be low, resulting in blurry render images. You can adjust the resolution by following these steps:

　　1. Open Blender and navigate to the "Render Properties" panel.

　　2. In the "Resolution" settings, increase the resolution values (Resolution X and Resolution Y). For example, you can set it to 1920x1080 or higher.

　　3. Ensure the "Percentage" option is set to 100%.

　　Sampling Settings

　　Too low sampling numbers can also lead to blurry rendering. Sampling determines the number of light ray calculations per pixel, with higher sampling numbers resulting in better rendering quality. Adjust the sampling settings as follows:

　　1. Go to the "Render Properties" panel.

　　2. Under the "Sampling" section, in the "Render" subsection, increase the sampling number (Samples). For example, you can set it to 128 or 256, or even higher.

　　2. Camera Settings Issues

　　Focal Length and Depth of Field

　　Improper camera focal length and depth of field settings can cause rendering to appear blurry. Ensure the camera is aimed correctly at the intended object and has appropriate focal length and depth of field settings:

　　1. Select the camera and access the "Camera" properties panel.

　　2. Ensure the focal length and depth of field settings are appropriate.

　　3. If depth of field effect is enabled, ensure the focus object is set correctly.

　　3. Material and Texture Settings Issues

　　Texture Resolution

　　Low texture resolution can result in blurry rendering. Make sure to use high-resolution texture images:

　　1. Check the texture files used on the model to ensure they are high-resolution.

　　2. If necessary, re-import high-resolution texture files.

　　UV Mapping

　　Incorrect UV mapping can also cause texture blurriness. Check and adjust UV mapping as follows:

　　1. Select the model and enter "UV Editing" mode.

　　2. Ensure UV mapping is correct without overlap or stretching.

　　4. Motion Blur Settings

　　Enabling motion blur may cause image blurriness. Motion blur is used to simulate the blur effect of moving objects but may not be suitable for static images. You can disable motion blur as follows:

　　1. Go to the "Render Properties" panel.

　　2. In the "Motion Blur" options, uncheck "Enable Motion Blur."

　　5. Lighting Settings Issues

　　Improper lighting settings can affect rendering quality. Ensure the scene's lighting is set appropriately to avoid overexposure or insufficient lighting:

　　1. Check all light sources in the scene and adjust their positions and intensities.

　　2. Use multiple light sources to illuminate different angles to avoid heavy shadows or insufficient lighting.

　　6. Post-Processing

　　After rendering, you may need to perform some post-processing to enhance image quality. Blender's built-in compositor can help optimize rendering results:

　　1. Access the "Compositor" panel and enable "Use Nodes."

　　2. Add necessary nodes such as sharpening or color balance to adjust the image effects.

　　7. Graphics Card Performance

　　Insufficient graphics card performance may also cause rendering quality issues. If you're using a low-end graphics card, you may need to upgrade hardware or optimize rendering settings to improve performance.

　　There can be various reasons for blurry rendering in Blender, including rendering settings, camera settings, materials and textures, motion blur, lighting settings, and graphics card performance. By checking and adjusting these factors, you can significantly enhance rendering quality and achieve clear images. If you need high-quality 3D textures, HDRI, or 3D model downloads while creating models and virtual scenes, you can download them from Relebook and import them directly into your models for use.