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Area Lights: Mathematical Fondations
Reading time: 49 mins. Please Read: A Word of Warning Area lights are more complex to implement than point, sun, and spot lights.
Given that computer power has significantly evolved since Kajiya's era, ray-tracing remains computation-intensive, but now machines can handle the task within reasonable times, facilitating its widespread adoption in production in recent years. It subdivides a large problem, such as the physical phenomena of heat transfer or elastic deformation, into smaller, simpler parts called finite elements, and then reconstructs the solution through a process of synthesis. The reason why we've delved into this explanation is primarily to understand the initial steps of implementing the Monte Carlo method, which involves generating samples according to a specific probability distribution function.
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