I wish this was my studio. The image is rendered with Blender cycles, 1,000 samples and it took over 30 hours to render. (CPU).
Have done all the furniture and stuff myself, the pictures are made with my Wacom tablet in Corel Painter and some textures are also made in Corel Painter by UV export. The textures that are borrowed, the rear wall and the seat cushion, I have downloaded from the internet but I can not remember where. (I'm an old woman with a bad memory :))
HDR image is from Andrew Price's Arhitect Academy Starter Pack, but I'm not a member there yet but hope to be someday.
