The Artist Philip Modin has released 12 free HDRs of industrial environments, including factories, workshops and a gas tanker
All of the images are supplied in 14-megapixel (5,376 x 2,688px) spherical in EXR format, with LDR previews and test renders of chrome, glass and grey balls.
The files are licensed for use in commercial projects.
>> Download HDRI free download
Free HDR Environment Maps
HDR Set – Industrial
You can download the files from the link Modin’s Gumroad store and enter a figure of $0 to get them for free, or you can choose to make a voluntary donation.