Hi,
I am trying to make some items look more realistic instead of looking flat, like kitchen sinks, picture frames, appliances, glasses and even mirrors that come from other software.

If your material is PBR, you go to your material editor, select your metallic map first and then open up color adjust and push the brightness level all the way right until it is white, then you close out and select your roughness map, open the color adjust and start to push the brightness level left towards black until you reach the level of gloss you are happy with.


artstation.com/dreadmoormediaarts

In addition you could enable Reflection.
It is a little tricky. In order to make reflections working, you need to lower the opacity at least 1% down.




Notes:
* Reflections are not exactly accurate in most cases
* Reflections could drag the performance and render time down if enabled for too many surfaces in the scene.
* You may want to disable "Environment Reflection" in Real-time Render options to boost  Real-time performance and FPS play back (this does not affect the render, where reflections would still be in effect in rendered clip/image)

It's in your metallic and roughness, the roughness map is the most important map for this kind of thing.

iClone Certified Director and makes miserable Westerns.

Thank you for the advice, I will try it out.

Does anybody know how to make water flow from a showerhead?