is there a difference between

painting textures and image textures? Does one have better quality?

also, I’m confused about material shaders in cycles if you can do it. If I dont use a image for a texture, say a concrete and wood texture, do I just use nodes on a material shader? for an example, using a grundge map and a light black color for a metal post color?

Thank you, I’m starting to learn photoshop to help with my textures.