Bella is a spectral render engine which models the complexities of optical physics in ways that are both as correct as possible, and which are yet made intuitive and accessible.
The unique Bella material model allows exquisitely subtle materials to be created by combining just a few fundamental components, which themselves have only a small number of consistent and logical parameters.
Bella's camera will be familiar before you even begin, as it is modeled on real cameras, and supports lens shift, optional vignetting, circular/polygonal aperture, exposure compensation modes, sensor sharpness, diffraction and bloom, lens filters, and more.
Along with its materials and cameras, Bella also uses its nodal scene description to provide extensive instancing of geometry -- indeed, there is no separate concept of instance in the system, as everything rendered is inherently an instance, or an instance of an instance, and so forth.
And of course, Bella also provides support for various procedural geometries, lights, and textures, as well as industry-standard file I/O and color management by way of OpenImageIO and OpenColorIO, along with built-in denoising courtesy of Intel's OpenImageDenoise.
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