RenderingAnsatz
RenderingAnsatz is a methodological construct in computer graphics that refers to positing a specific parametric form for modeling light transport in rendering tasks. The term borrows from physics, where an ansatz is an educated guess about the structure of a solution used to reduce complexity. In rendering, a RenderingAnsatz specifies the functional form of one or more components of the rendering equation, such as the BRDF, the illumination field, or the light transport kernel.
By restricting the space of admissible functions, a RenderingAnsatz can enable faster computation, differentiable or inverse
Common instances include a Lambertian base with a parametric glossy term, separable lighting models, or low-rank
Relation to broader ideas includes the physics-origin of an ansatz, differentiable rendering, and neural rendering. See