The room was made as a test task.
For lighting, I used Unity realtime lightmaps supplemented with custom SSAO and SSGI. To calculate the lighting, I used highly simplified models. Objects in the scene are illuminated through lightprobes or lightprobes proxy volumes.
For the black goo effect, I used command buffers that modified GBuffer.
For the environment, I used the assets of Vitaly Okulov: "HQ Abandoned School" and "HQ Retro Farmhouse".
https://www.artstation.com/not_lonely