Polygon Runway (polygonrunway.com) is the online 3D-illustration teaching platform of Roman Klčo, a Slovak 3D artist whose tutorials on Blender for low-poly illustration have built one of the larger independent 3D-art education brands online.
The CourseFlix listing carries two Polygon Runway courses: Become a 3D Illustrator! and 3D Characters and Illustrations. Together the courses cover Blender as a production tool for low-poly illustration work — the style that has become a recognisable visual language for tech and SaaS product marketing.
Material is paid and aimed at illustrators and designers picking up Blender for stylised 3D work rather than realistic VFX. For broader content, see CourseFlix's Blender category page.