The document discusses different types of compound objects in 3D modeling software including morph, scatter, conform, connect, blobmesh, shapemerge, boolean, terrain, loft, mesher, and proboolean objects. It provides examples of using loft objects to extrude 2D shapes along a third axis and boolean operations to combine two objects using union, subtraction, or intersection. The document also demonstrates using the scatter compound object to distribute instances of one object along another and applying multi/sub-object materials.