Method: Literature Review. The literature review followed a basic systematic process.[Identification] A manual web-based search in the Google Scholar database with keywords such as “Virtual Reality”,“Computer-Aided Design”,“3D modelling” and “Geometric modelling” leaded to a collection of 16 conference proceedings and journals since 2010. In parallel, the same keywords served as Google queries for searching commercial and open source CAD solutions in VR.[INITIAL SCREENING] Journal articles and conference proceedings were reviewed by two different researchers. After reading the abstracts, both reviewers excluded 13 irrelevant papers from the literature review because they were too old or out of scope.[REFERENCE LIST SEARCHES] Inclusion of 6 articles identified through the list of references provided by the papers previously selected.[FOLLOW-UP SEARCHES] Inclusion of 4 articles identified through follow-up searches based on an extended list of keywords collected in the papers previously selected.[FINAL SCREENING] After reading the abstracts of newly selected articles, reviewers excluded irrelevant papers from the literature review.

Benchmarking.[Define criteria] We propose categories (eg geometric entities, dimensional constraints, geometrical constraints, volume operators etc.) to organise criteria (eg geometrical constraints={coincident, perpendicular, parallel, concentric, tangent, etc.}). The list of CAD criteria results from the extensive experience in CAD of the authors. A manual review of two widely used commercial CAD software including (3DExperience and PTC Creo) enabled to crosscheck the required capabilities too.