Normal Map Photoshop 2020. Use Photoshop GIMP or VTFEdit instead. Photoshops ability to generate maps is one thats been there for a while.
For this you need a simple camera a flashlight and optionally a tripod. Click that and select Generate Normals From Diffuse After a few seconds up pops the Generate Normal Map window. Go to Filter 3D Generate Bump Map.
Normal maps are as easy to create in Photoshop as Bump maps.
This black and white image will be the map you will use. Neither Filter 3D Create Normal Map and Create Mesh Sphere Marterial Create Normal Map from Diffuse. The Properties panel changes to reflect options corresponding to the material properties. Under the filter menu 3D you can choose to create a normal map or a bump map from any open file.