XSight RT includes full support for Constructive Solid Geometry (CSG) operations: unions, intersections and differences. A future version will include support for merges, a union variant that eliminates internal surfaces from a union.
CSG operations are an indispensable resource for creating complex shapes from the simple basic solids provided by XSight RT, as in this image:
Home | Small Instantiation Language | Scenes | Predefined shapes | Difference | Intersection | Union | Cone | Cylinder | Sphere | Torus | Blob