Thanks for showing us the images.
I hope it is ok to give you some critical feedback.
- Please don't get this the wrong way but these images are not looking very good because of lack of knowledge, not because of the Software.
- I suggest you go through some lighting tutorials for Twinmotion, there are some basic free ones on the Twinmotion Youtube site. They are not in depth but will give you a better understanding on how to lighten a scene.
- First turn off automatic exposure ( if it is off you need to turn down the sun intensity under settings, as it is set on maximum when automatic exposure is on)
- In the bathroom with very little natural light you need to use aerial lights.
- Add an aerial light in front of the window pointing horizontal into the room. Make sure it fits the window size. - Add another aerial light pointing from the entry door inside the room. This is a little bit cheating but will help the overall lighting of the scene. This light needs to be very low, like a tiny bit or you can see you "cheat"
- Add a reflection probe to improve the quality.
- make sure you turn on parallelism for the camera so the walls look straight.
If you work on this, the images will improve quite a lot.
There is much more to create a really high quality image but for this you need to be a 3D Digital Artist for a while, just like in any other job. With experience comes quality.
I have attached a work in progress image of an interior course I am producing. You can see that TM quality is pretty good if you know what you are doing. Not as good as vray as I mentioned before but I think most clients would be more then happy with this type of quality.
Should you be interested to get a really good foundation for TM including the 3 key elements - 3D model - texturing - lighting of a scene, then check out the info about my Twinmotion Masterclass for Archicad users here: https://www.asmtechbase.com/twinmotion-course-more
AC 3 to 26 -Windows 7 - 24GB - 8core 4.4Ghz