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In this paper we address the question whether automatic shape creation using sketched strokes as input in an immersive 3D environment supports the sketching process in early phases of product design. To investigate this question, model creation and deformation algorithms of the desktop sketch-based modeling tool FiberMesh [NISA07] were transferred to an immersive 3D environment. A comparative user study was conducted among twelve design students and professional designers. Line-based sketching in a 3D environment and sketch-based modeling, both in a 3D and 2D environment were compared. The analysis of the study yielded few differences between the conditions, but two findings were made: usability for a creative sketching task was perceived higher for line-based sketching than for sketch-based modeling - both in an immersive 3D environment. Shape modeling in immersive 3D environments was perceived as more stimulating and attractive than under 2D conditions.

Shape Modeling with Sketched Feature Lines in Immersive 3D Environments