Buto

Buto is the volumetric fog you've always wanted

Bring your game's environment to life with Buto. Buto is a powerful volumetric fog and volumetric lighting system for Unity URP.

With Buto, you can add realism to your outdoor scenes. Create a misty forest or a foggy mountain. Add an eerie atmosphere to your spooky horror game. Or light up the dance floor in your rhythm-based dance game.

With Buto, you can achieve your artistic vision and take your game's atmosphere to new heights. Experience the future of volumetrics and make your game stand out with Buto.

Immerse players with realistic volumetric fog for Unity

Buto is a powerful tool that can elevate the atmosphere of your game. This helps you to attract new players and immerse existing ones.

Buto is great for both beginner and expert developers.

Buto looks great. This asset renders physically-based volumetric fog and lighting in your scene. Experience hyper-realistic volumetric lighting and volumetric shadows. Buto works with most light sources - directional lights, point lights, and spot lights.

For beginner developers, Buto is easy to use and powerful. The asset is easy to set up. Add volumetric fog and volumetric lighting to your project in seconds. Control the density to set the scene.

Buto includes everything you need to make your fog look great. The asset makes it easy to customize the color of the fog. You can also create localized fog using fog density masks - all in the editor. Add or erase localized fog to give you complete control over your scene.

For expert developers, Buto is configurable and adaptable. Buto offers a wide range of advanced features. These features empower you to take your game's atmosphere to the next level. Control your global fog or localized fog in real-time with code.

Buto integrates well with other assets from the Unity Asset Store. And, Buto offers shader include files. These files enable you to integrate the asset with your favorite shaders. Buto works with custom shaders, Amplify Shaders, and Shader Graph. Buto is compatible with transparent materials.

Objects in your scene occlude lighting and cast shadows into the fog. In other assets, you need to look towards the sun light to see the lighting. In Buto, it always works.

Buto can be used in a variety of use cases in your game, from adding realism to outdoor environments, such as a misty forest or a foggy mountain, to creating an eerie atmosphere in a horror game. The volumetric noise feature can be used to add texture to the particle distribution, making the fog look more natural. The atmospheric height fog feature makes the particle density exponentially decreases over height, resulting in realistic fog attenuation over altitude. The Long-Range Visual Consistency feature can be used to guarantee visual realism over long distances. The Stylized Fog Options feature allows you to achieve your artistic vision with color ramps, simple color adjustments, directional lighting controls, and light and shadow intensity sliders.

Buto is a must-have asset for any Unity developer looking to create immersive and believable environments in their game. With its advanced features and user-friendly interface, Buto is perfect for both amateur and expert developers. And with our 100% satisfaction guarantee, you can trust that Buto will meet your needs and exceed your expectations.

Our volumetric fog and volumetric lighting asset offers tons of powerful features

1. Physically based: Our volumetric lighting and fog accurately renders atmospheric particles and light scattering using algorithms described in leading technical papers and strategies from major AAA studios.
2. Volumetric Lighting and Shadow: Objects realistically occlude lighting by interacting with the fog, keeping your fog grounded in your scene.
3. Fast: Optimized, high-performance rendering with intelligent depth-aware upscaling (~0.7ms on an Nvidia 1080 desktop equivalent).
4. Volumetric Noise: Built-in customizable volumetric noise gives texture to the particle distribution. Choose from 5 configurable volumetric noise styles or import your own texture for the ultimate control.
5. Atmospheric Height Fog: Particle density exponentially decreases over height, resulting in realistic fog attenuation over altitude.
6. Long-Range Visual Consistency: Toggleable analytic height fog can be rendered behind local volumetric fog to guarantee visual realism over long distances.
7. Stylized Fog Options: Achieve your artistic vision with color ramps, simple color adjustments, and light and shadow intensity sliders.
8. Additional Lights: Illuminate the fog with volumetric point lighting.
9. Fog Density Masks: Add or erase volumetric fog using Fog Density Masks
10. Temporal Anti-Aliasing: Improved quality for high-density fog with optional Temporal Anti-Aliasing.
11. Integrated with the Volume Component System: Seamlessly tie Volumetric Fog into your workflow with Unity's Volume Component system. Set Global Fog parameters and local Box and Sphere Volume parameters with seamless blending between Fog Volume settings.
    

Unity developers already use Buto in their projects

• Hopper's Cabin by VHS Knight (itch.io)
  

We tested Buto across the major graphics APIs to ensure compatibility

Vulkan, OpenGL, Direct3D 11, Direct3D 12

Buto offers support for almost every use case

1. Compatible with both Perspective Projection and Orthographic Projection.
2. Transparent materials are not fully supported. Objects using transparent materials are rendered after the fog pass and will not receive the effects of the fog. You can override this behavior using the included Buto.hlsl shader include (see Demo Resources for example usage).
3. VR SPI is not supported.
   

If you're not happy, we will refund you

Please reach out to us directly at [email protected] or on Twitter @occasoftware if you have any problems or questions. If you are not satisfied, we will refund you.

Q: Is Buto compatible with Forward and Deferred Render Paths?

A: Yes. Buto is compatible with both Forward & Deferred Render Paths.

Q: Do you recommend Buto for mobile?

A: No. Buto is a ray marched screen space volumetric effect. As such, you would be advised to use console or PC hardware.

Q: Does Buto fog transparent materials?

A: No. Transparent materials will be rendered after Buto and will be unaffected by the fog.

Q: Do you recommend Buto for 2D games?

A; No. Buto relies on the depth buffer for fog rendering. 2D games typically do not have a depth buffer available for rendering, so Buto is mostly incompatible with many 2D projects.

Q: Can I use Buto and LSPP together?

A: Absolutely - Buto and LSPP can be used together or separately for different effects. LSPP is great at adding additional light scattering when the sun is in view. It can add really fast, really powerful light rays with minimal setup or configuration. Buto is powerful and flexible, is physically based, and supports volumetric noise and lighting. Combining them can give you a really cool, layered effect. Games like Elden Ring use these types of techniques together, with (their equivalent of) Buto used to add depth and texture to the scene and (their equivalent of) LSPP used to add sharp, powerful, dynamic god rays.