Spectral imaging in production

Unlike path tracing, spectral rendering is still not widely used in production although it has been around for more than thirty years. Traditionally connected to spectral effects such as dispersion and interference, spectral rendering - and, more importantly, the use of spectral data in general - is predominantly a way to guarantee colour fidelity. Additionally, with the rise of path tracing and the growing use of LED lights on-set as well as the recent shift to LED walls in virtual production, it becomes increasingly evident that the traditional way of seeing colour and light as RGB triplets is insufficient if colour accuracy is required.