To make the rendering more interesting we need some furniture.

Having furniture in the rendering gives surfaces for light to react to, giving it a more realistic feel. 

Steps

1. After installing the above Extensions, decorate your room however you like.
   
   There is no limiting factors on how you want to decorate the closed room, so feel free to decorate it however you want!
   Or, you can just download the resulting drawing at the top of this article.
   Please note that the quality of the 3D-models representing the furniture have a big impact on the final image. Only use high quality 3D-models and materials in order to produce a realistic looking rendering.

    

2. Let's try increasing the brightness by clicking the Make brighter button multiple times in Post processing.
   
   
   We'll make it as bright as it can be!
   
   Wow, that's bright! 
   
   
3. Now let's try making it as dark as possible:
   
   
   
4. Hmm, let's just try getting it in the sweet spot:
   
   
   Congratulations! You have just produced some high-quality renderings!
   We can explore further to make this rendering more interesting.