The rendered image doesn't look realistic at all.

[eap1112]

This is the image I rendered．
I'm not very happy with this image, because this looks like a painting, not real.
How can I improve it to make it look more realistic?

[romullus]

Making nice looking picture is quite easy these days, you just toss a bunch pre-made assets, add materials from mat libraries, enable HDRI and job done. If you want to make that same picture to look outstanding, that's where real work begins. You need to have deep understanding about materials, composition, lighting and so on. Everything that comes with years of practice and can't be easily transferred in single forum message. As with almost anything in life - the last 10% requires 90% of effort. If you're just a beginner, don't expect to create masterpiece after watching couple tutorials, just try to make each work slightly better than previous one and build your knowledge one step at the time. The quality of your work will increase with time.

[TomG]

Very quick passing thoughts:

- The composition feels off to me, with too much floor and bare wall, with the area of interest squashed into the center of the image.
- The wall and floor material are too even and plain, some more bump, some more imperfections (color variation, roughness variation, footprints - for the floor, not the wall ;) ) could help here
- Same idea of roughness variation I think would help on the wooden materials
- It feels a bit too contrasty for me, the dark areas are darker than I personally would go for
- The lamp in the bottom right is particularly distracting, it needs a good metal with lots of detail for the non-translucent areas (or whatever you material you want to make it out of, right now it looks like a grey clay or plastic with no character). I'd also work on the translucency a bit more, right now it looks as if the light bulb inside is off center inside the lamp which seems strange. I'm also not sure of including it at all, as it pulls my eye over to it every time and away from the main elements of the scene.

Just my personal thoughts on where I'd be going with this image :)