In a nutshell:
3D Gradient Mapping is a visual style defined by the application of different colours to different tones on 3D forms to create an abstract and surreal visual effect. The style often focuses on an item or shape that embodies a culture or feeling, such as a chain, a cylinder or a pair shoes. The effect takes the ordinary and reframes it to create something that is vibrant and unexpected. An unexpected visual contrast for the viewer.
Nicolas Law, Vasya Kolotusha Madebykaran are among artists that are making notable work in this space.
Also see Digital Brutalism