# An example input file to draw three tori in 3D space. region: " -(x^2 + y^2 + z^2 - 1.0) | -((x - 2.5)^2 + y^2 + z^2 - 1.0) " bounds: [[-5, -5, -5], [5, 5, 5]] resolution: [100, 100, 100] algebra: alpha: "0.0" blend: "-1 / (1 + f1^2 + f2^2)"