  A key goal of freeform manufacturing is to achieve speed, precision and
design freedom at the same time. Volumetric additive manufacturing via
tomographic reconstruction offers high speed but cannot achieve optical
resolution at high design freedom. Here we combine polyspectral tomographic
reconstruction with pseudo-negative illumination to resolve the trilemma. We
used the same units on a digital micromirror device to modulate two colors of
illumination simultaneously to control the chemical stability of binary
photoinhibition. The methodology enables a typical 4K projector to 3D-print up
to 8.9 billion voxels in a 30x30x50 mm vial at two-digit-m-resolution in
minutes, with prolonged process window and geometrically fidelous greyscale
printing. These results are linked to, and thus can be improved directly upon
upgrading, the precision of the optomechanical modality.
