A lot of work, so much modeling of objects! If you have planned a white ceiling, then there are some tips to get it. 1. You can use a tool from the library of new fixtures, Invisible Light Panel. you can find it here
https://www.sweethome3d.com/support/for ... attach=396 . The panel in the size of the entire room should be rotated around the X axis by 180 and directed towards the ceiling. The power should be picked up by a small 2-10%, try on low quality, adjust. The panel should be lowered below the ceiling level by 2-3 cm. The second method can also help. It is necessary to replace the ceiling with a light panel from this library of light, do not turn it over, leave it as it is - down. And assign it a gray color, and give it a large power of about 100%, but it may be less. Also try it first on poor quality, adjust the power. And of course, the third and most correct option is to switch to an innovative light exposure system using Invisible Inward Light Half Sphere. I highly recommend mastering such a system. It can be found in my writings in the next topic)))))) In renderings with a traditional system, there is not enough truthful transmission of lighting from sources in the scene. I.e. there is no direction of light rays from the chandelier, and accordingly there are no falling shadows from objects that should be from the chandelier. And in your picture, too, there is no darkness under the chairs, the table. And this is important for a truthful picture, otherwise it turns out to be untrue. Although this can be called the corporate identity of the program))).But if you don't want to change your skills, the first two tips will also help. Try it, it's interesting.
