Hi there and welcome!

There is a thread around this site somewhere about hyper-reality, which is what you are talking about. It is possible to make things more vivid and detailed in a lucid dream, indeed this is the first thing many people do when they become lucid. To achieve this you basically have to stop whatever you are doing and really pay attention to the scene surrounding you. Notice all the colours and textures around you, smell the air and listen to the sounds around you. Many people find it is useful to look at your hands and notice all the detail on them, your fingerprints and nails etc. As you do this you will notice that everything will become more vivid and detailed - often until it does seem "more real than reality". This also has the effect of stabilising the dream so that you can stay lucid longer in addition to increasing the vividness.

And yes you can definitely experience tastes and smells in dreams. Pain i find is usually experienced as a dull aching sensation rather than searing pain.

Enjoy!