Free image to pbr shader generator
there are hundreds of photo textures you can find on the web to use for your 3d renders, but most professionals using 3d applications prefer a PBR based workflow, meaning they want to use textures that come in a set of pbr maps which include a color/albedo map, roughness, normal map and Ambient occlusion, while there are alot of website where you can find pbr sets like these, sometimes what you want does not come as a pbr set.
how to use shaderMap
this free sofware will use the image you have to generate all the texture maps you need for your pbr shader.