Abstract: A multi-material printer for using multiple materials, e.g., bioinks, to quickly fabricate structures, such as high-throughput screening microfluidic chips. The printer’s light projector for emits light in an exposure sequence to cure material in an additive manufacturing process. The printer further includes a motion stage operable to move a build platform into and out of the reservoir in coordination with the exposure sequence. The printer further includes an indexing stage having a work table for supporting the reservoir. The indexing stage is operable to selectively align the build platform with multiple different materials of the reservoir. The multiple materials may be arranged at distinct angular positions within a single reservoir, and the indexing stage may be operable to rotate the work table to align the build platform with different materials during the exposure sequence for a quick transition among different materials without refilling of materials, exchange of reservoirs, etc.