Make Blender Render Faster with These Simple Changes - Render Pool-Cloud-based GPU rendering

Blender offers powerful tools for creating detailed 3D scenes, but complex models, lighting, effects, and animations can result in long render times. Fortunately, optimizing your settings, simplifying unnecessary elements, and using your hardware effectively can significantly improve rendering performance without sacrificing quality. Keep reading for practical tips to make Blender render faster and create a more efficient workflow.

Choose the Right Render Engine

Before adjusting individual settings, consider which render engine you’re using. Blender’s Cycles and Eevee engines use different approaches to rendering, so the appropriate choice depends on the requirements of your project.

Cycles is designed for physically based rendering and can produce highly realistic images. However, complex scenes can require more processing time. Eevee uses real-time rendering techniques and can deliver much faster results for certain projects. Neither engine is universally better than the other. The right choice depends on the type of image or animation you’re creating.

For example, an animation with thousands of frames can benefit greatly from faster rendering. On the other hand, a high-resolution image intended for a close-up advertisement may require more detailed calculations.

Reduce the Number of Samples

The number of samples used during rendering can significantly affect render time. Higher sample counts generally produce cleaner images, but they also require Blender to perform more calculations.

It can be tempting to increase the sample count whenever a render contains noise. However, extremely high sample settings may provide only a small visual improvement while substantially increasing the rendering time.

Denoising can help reduce this problem. By using an appropriate number of samples together with denoising, you can often achieve a clean image without requiring an excessive number of samples.

Optimize Your Geometry

Detailed models can contain large amounts of geometry, even when their complexity isn’t immediately apparent. Downloaded furniture, vegetation, vehicles, scanned objects, and architectural models can sometimes contain considerably more polygons than a particular scene requires.

Consider how each object appears from the camera. An extremely detailed tree in the background of an exterior visualization may provide little additional visual benefit compared with a lower-detail version. The goal isn’t to make every object low-poly. Instead, use detailed geometry where it contributes to the final image and reduce unnecessary geometry where the viewer is unlikely to notice it.

Reduce Unnecessary Modifier Settings

Blender modifiers provide useful tools for modeling and creating complex effects, but some can significantly increase the geometry Blender needs to process.

Subdivision Surface is one common example. Increasing the subdivision level can turn a relatively simple mesh into a much more complex object. Additional effects, such as displacement, can increase processing requirements even further.

Consider lowering subdivision levels when creating test renders. You can also temporarily disable expensive modifiers when they aren’t needed to evaluate the scene. If you apply the same modifier to many objects, even a small reduction in complexity can noticeably improve the overall rendering process.

Simplify Your Lighting

Lighting is an important part of creating realistic 3D scenes, but adding more lights doesn’t always improve the final image. Examine each light in the scene and determine how much it contributes to the final result. If several lights have little visible effect, consider disabling them and comparing the result.

The same principle applies to shadows and indirect lighting. Higher-quality lighting calculations can improve realism, but unnecessary complexity can increase rendering times without producing a noticeable improvement.

Effective lighting doesn’t necessarily require a complicated lighting setup. A carefully planned arrangement of lights can often provide the desired result while keeping the scene easier to manage.

Control Reflections and Transparency

Reflective and transparent materials can make a scene more demanding to render. Glass, mirrors, polished metals, and reflective floors may require Blender to calculate additional light paths before determining the appearance of a pixel.

A single reflective or transparent object may have little effect on performance. However, a scene containing many glass surfaces, mirrors, glossy materials, and objects visible through transparent surfaces can require considerably more calculations. Reducing unnecessary light bounces can help shorten render times while maintaining the desired appearance.

Transparency should also be used appropriately. If a material doesn’t require complex transparency calculations, avoid using settings that add unnecessary processing to the scene.

Use Lower-Quality Settings During Testing

Smoke, fire, fluids, hair, particles, and volumetric effects can substantially increase rendering times. These effects can be especially expensive when they are calculated at their highest quality. There is usually little benefit in using final-quality settings while you’re still making basic creative decisions.

For example, if you’re still deciding where to position the camera, you don’t need to calculate a high-quality fluid simulation for every test render. Use lower-quality settings while developing the scene, then increase the quality after you’ve made the major decisions.

This approach is especially useful for animation because even a small increase in render time can add up across hundreds or thousands of frames.

Use the Appropriate Hardware

Your computer’s hardware can greatly affect Blender’s rendering performance. If you’re using Cycles, check that Blender is configured to use the appropriate rendering hardware available on your system.

Modern graphics cards can significantly reduce render times, but GPU rendering also depends on available video memory, or VRAM. If a scene requires more VRAM than the graphics card provides, performance can decrease or the render may fail.

In some situations, CPU rendering can be slower but more practical for scenes that don’t fit comfortably into GPU memory.

During a test render, monitor CPU, GPU, RAM, and VRAM usage. This can help identify the bottleneck and make it easier to determine where optimization is needed.

Optimize Before Upgrading Your Computer

A hardware upgrade can improve rendering performance, but it shouldn’t necessarily be the first solution to a slow render.

A scene containing excessive geometry, unnecessarily large textures, high sample counts, and complicated lighting can remain inefficient even on a more powerful computer. Upgrading hardware may simply allow the same inefficient scene to render faster.

Start by optimizing the scene and rendering settings. Once you’ve optimized the project and rendering still takes too long, upgrading hardware may provide a more meaningful improvement.

Consider Cloud Rendering

Some projects are too large to render efficiently on a single computer. Cloud rendering services such as Render Pool provide another option. Instead of relying entirely on one workstation, artists can affordably send rendering workloads to remote computers and continue working locally.

Cloud rendering can be useful for freelancers working with demanding projects, studios handling multiple projects, or artists working with long animations. Distributing the workload can reduce the amount of time required to complete a large rendering job.

Key Takeaways for Faster Blender Renders

When a Blender render is taking too long, work through these areas first:

Start with the scene: Remove unnecessary geometry, modifiers, lights, reflections, and transparency.
Adjust render quality: Reduce samples and use denoising where appropriate rather than automatically rendering at maximum quality.
Work at lower quality: Use reduced settings for simulations, effects, and test renders while developing the scene.
Check your hardware: Make sure Blender is using the appropriate CPU or GPU, and monitor VRAM and other system resources for bottlenecks.
Optimize before upgrading: An inefficient scene can remain slow even on more powerful hardware, so optimize the project before buying new equipment.
Scale up when necessary: For large animations or demanding projects, cloud rendering can distribute the workload across additional computers.

There is no single setting that will make every Blender project render significantly faster. The most effective improvements usually come from identifying which parts of the scene require the most processing and reducing unnecessary calculations. For particularly demanding projects, try Render Pool to distribute your workload and finish renders faster.