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Affordable rapid 3D printing technologies have become a key enabler in the maker movement by giving individuals the ability to create physical finished products. However, existing computer-aided design (CAD) tools that allow authoring and editing of 3D models are mostly visually reliant and limit access for people who are blind or visually impaired. We propose an accessible CAD workflow where 3D models are generated through OpenSCAD, a script-based 3D modeling tool, and rendered at interactive speeds in an actuated 2.5D shape display. We report preliminary findings on a case study with one blind user. Based on our observations, we frame design imperatives on interactions that might be important in future accessible CAD systems with tactile output.

An Accessible CAD Workflow Using Programming of 3D Models and Preview Rendering in A 2.5D Shape Display