In this article we describe the implementation of Freeform Optics Raytracer with Manufacturable Imaging Design cApaBiLitiEs (FORMIDABLE): an optical design library capable of simulating optical systems by ray-tracing. Optical performance can be quantified and optimised using third-party optimisation algorithms. Compared to available commercial optical design software and similarly to ... https://countryscenesaddleryandpetsuppliers.shop/product-category/syd-hill-oilskin-full-length/