Why Does Rendering Take So Long? All Reasons

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Nobody likes sitting for their render to finish for hours. But most people do wait. So here we discuss below Why Does Rendering Take So Long? They have no idea that with a little adjustment, they can decrease render times in half.

The huge CPU-hogging features are turned on by default since the blender developers want to make sure you receive the greatest-looking renders. However, turning these off when you’re still working on the scenario and don’t need to see the finished image makes sense.

Why Does Rendering Take So Long?

Rendering times depend on the CPU and the project. CPU: Your rendering will finish more quickly the faster your computer’s CPU is. A faster CPU is often preferable for faster rendering times. PROJECT: In comparison to smaller, simpler projects, bigger, more complicated projects will likewise take longer to render.

Rendering Take So Long

Rendering is the process of creating your movie (or presentation) from all of the materials you’ve put together in your project, such as video clips, stills, titles, menus, audio, and so on.

If your end product is a DVD, Studio will need to convert all of the content in the timeline to MPEG 2 format during the rendering process, as this is the standard format for DVDs.

As a result, whether your project contains AVI video files, stills, titles, or menus, Symphony will need to “render” such files to MPEG 2 as part of the Make Movie operation.

Solution For Rendering Take So Long

While there isn’t a magical formula you can push to make your renders complete and clean up faster, there are a few things to consider that may or may not assist.

Solution For Rendering Take So Long

Diminish The Dimensions

It’s a simple trick, yet it’s easy to overlook. The scene will be rendered four times faster if the resolution percentage is set to 50%!

Make Materials That Aren’t Traceable

You can remove material from the ray-tracing computation by deselecting Detectable in the materials section. I’ve saved HOURS of processing time as a result of this. Turn this off if you have a complicated object that doesn’t require shadows or reflections. You’ll be surprised at how quickly your scene renders.

Begin Baking

The blend has to compute all the shadows, atmospheric occlusion, and lighting in the environment every time you hit render. It’s highly suggested that you bake all of this data if you’re making animation so that Blender just has to calculate it once.

Increase The Number Of Tiles

The small boxes that appear when Blender renders the scene are known as tiles. When rendering to a large scale and needing the CPU cores to draw smaller portions increasing tiles is advised. This ensures that all cores work on the render until it is complete, with no core finishing ahead of the others.

Anti-Aliasing Should Be Turned Off

The anti-aliasing option is another tool that might add hours to your render timings. This option, which is turned on by default, guarantees that all of the borders in your scene remain clean and untagged. Turn it off if you aren’t rendering the final scenario yet! Your rendering times will be halved.

Turn The Shadows Off

Turning off the shadows while rendering samples can help if you are not showing the final scenario.

Groundwater Scattering should be turned off:

Sub-surface Scattering greatly increases showtimes! If you perform a lot of character modeling, you’re probably well aware of this, but for those who aren’t, Only enable this option if you’re working on the final render. Turning this off, according to a short test, can cut render times by 6 times!

Turn off the reflections That Are Smudged

The ability to create hazy reflections is a relatively new function. They do look nice but be willing to pay the price in render times. Blurry reflections are disabled by default, but if you adjust the Gloss value to anything less than 1 by accident, you may experience horrendous render speeds.

Activate Simplification

The Simplify option in Blender is a little-known tool. This helps you to quickly make preview renderings by setting global limitations on subdivisions, shadow samples, AO, and SS. If you need to do a lot of testing and modifying, keep this tool handy.

Ambient Occlusion Should Be Turned Off

Ambient occlusion is a terrific way to add authenticity to your picture by simulating indirect shadows. It is, however, renowned for adding hours to your render times. Turn it off if it isn’t absolutely necessary.

Sub Surf levels Should Be Reduced

You could call this obvious sense, but after 5 months of working on a scene, it’s easy to forget that you started with a car tire with 6 levels of sub-surf. In the long run, glancing over your scene and checking for any excessive sub-surf levels might save you a lot of time.

Ray Tracing Should Be Turned Off

Laser scanning eats CPUs for breakfast, in case you didn’t know. It’s fairly uncommon for ray tracing to increase render times by a factor of ten. Turn this CPU hogs off if your project doesn’t require reflections, ambient occluded, or ray shadows.

Other Options Include

Rendering Options

Your render parameters are another important element to consider. The number of light bounces, the number of samples, and the resolution are all factors to consider. Long render times are typically attributed to high-light samples, although resolution is also a key component.

It took about 5 minutes for each frame for a scenario I was producing at 1920×1080. I decreased the resolution to 1280×720, which cut the rendering time in half to 30 seconds per frame. If the file you’re sharing or using doesn’t require or use the extra pixels, consider lowering the resolution.


Another consideration is the setting. It could be a variety of things. Because you stated that you were rendering an inside, the fact that the light will be bouncing around more will cause your render to slow down.

Naturally, having complicated materials can slow down your rendering. It can also be done with a lot of lights if you have a lot of them. It can be a number of different things. It’s difficult to say without knowing more about your system and scene.


Your gear is the first thing that springs to mind. You’re not going to get very far if you don’t have some decent hardware. An Nvidia GPU with CUDA is recommended for the built-in cycle’s renderer. This is far faster than traditional CPU rendering. If you don’t have a GPU, having a good CPU is equally beneficial.

How Long Does Rendering Usually Take?

You must determine when you believe the render is clear enough for your needs. Most renders will produce their first image in less than a minute, but it can take up to three hours to produce a clear image. Large photos (those with a resolution of more than 5 megapixels) can require an overnight delay to become clear.

How Can I Speed Up My Rendering?

Optimize RAM Dedicated for Other Applications. Activate Multi-Frame Rendering. Cache Frames When Idle should be enabled. Utilize GPU acceleration. Boost Your Graphics Card. Make use of solid-state drives. Clean up compositions, and use effects sparingly.


That’s all there is to this about Why Does Rendering Takes So Long? Of course, there are a billion other techniques to speed up rendering, and I’d love to hear about them in the comments.

Many of the techniques mentioned in this article will be useful for future projects, while others may assist you in rendering faster right now. To save display time and crucial work time, make it a habit to optimize your scenes as you create them and to fully utilize compositing/post-production.

Frequently Asked Questions

How can I make my rendering go faster?

You can use a variety of techniques to cut down on media render times. Upgrade your hardware is the first and most obvious option. You’ll either need to upgrade your GPU or CPU, depending on the program you’re using to produce video and its GPU offloading capabilities.

When it comes to rendering, how long should it take?

They claim that rendering a single frame takes at least 24 hours and that there are 24 frames in a second. If you take a 100-minute video, rendering that many frames would take roughly 400 years.

Is extra RAM going to help with rendering?

RAM doesn’t have much of an impact on rendering times. This is because your computer will be able to attribute more resources to the RAM memory, which will free up more energy for your CPU and GPU to work with.

Is it true that a graphics card may speed up rendering?

You can relieve the burden on your processor and speed up your rendering time by adding a video card to your PC. Video cards work their magic by offloading rendering work from your computer’s CPU and handling it on their own. Your video card will have its own memory, which will improve your overall performance.

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