I am planning to make as much laboratory members as I can; next I am working on Kurisu and Suzuha (also from BD covers). I will make other members when the other BDs will be released, but if they’ll have nice art.
Technical side: Outlines made in SAI, then masks in Photoshop, after that everything is painted in SAI. After character was done, continued in Photoshop. Final .psd-file: 4096x2560px 573Mb 159 Layers.