Lumi is a story of snow and luminance, of reflection and planetary light. The video essay by Abelardo Gil-Fournier and Jussi Parikka arranges historical photographic datasets through the perspective of an imaginary synthetic intelligence trained for the repainting of landscapes as part of an operation of climate restoration. Lumi can be seen as a science and climate fiction about a collective intelligence of Artificial Agents that time travel from past photographic images to future programmed landscapes. This intelligence has grown out of those moments of light computing its path, together with the landscape computing its growth and preservation. Lumi is a dataset of snow, ice, and light. It is a film about the reversal of time and the synthesis of landscapes: once made, then remade.