The paper discusses the importance of spatial imagination skills development in engineering core education. Engineering graphics is the essence of engineering language and descriptive geometry knowledge still plays a major role in the development of spatial imagination abilities even at the age of rapid information technology advancements. The main objective of these introductory subjects is to establish the graphic communication basics and prove their importance when working with contemporary CAD systems. Geometric modeling and visualization exercises help in improving spatial perception skills. The selection of particular CAD system for this purpose depends on particular engineering curriculum. The efficiency of the teaching will be higher when the same CAD system, which supports Product Lifecycle Management concept, will be streamlined in different subjects during the studies. In mechanical engineering that would start with Engineering Graphics in first year, following Machine Elements, Kinetic Analysis, Kinematic and Dynamic Analysis, Finite Element Analysis, Flow Mechanics, Product Design, Rapid Prototyping, Computer Aided Manufacturing, etc. in further studies.