My improved BSDF system is very general and makes it really easy to add new BSDFs that contain any kind of reflection and transmission. To test this, I implemented a constant BSDF of 1/(2π). It's defined over the entire sphere, so it diffusely reflects half of the incident light and diffusely transmits the other half.
I rendered the image below in my bidirectional path tracer. The blue monkey on the left uses this new constant BSDF, giving it a soft and translucent appearance (putting a light behind the monkey would illustrate the translucency better). My next couple blog posts will describe the BSDFs I used for the other monkeys in this image.
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| The blue monkey on the left uses this constant-valued, reflecting and transmitting BSDF. |
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| A close-up of the blue monkey. |
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