One of the most important and useful features available in the rendering module is Light Compositing: you can edit light intensity of a rendering even after processing.
In the past, if you made the wrong choices with lights, you had to restart the rendering process from the beginning, which takes significant time.
With Light Compositing, you can modify the light channels on the rendered image; the only caveat is that you must first divide your lights into specific groups during the design phase of the project. This allows you to adjust the light groups at a later time. To learn how to group lights, see this article.
Note that we do not recommend creating TOO many individual light groups (i.e. each light should not be in its own group) as this would greatly slow down the rendering and create a very large rendering file. If you do not proceed grouping lights, the Application by default will group all artificial lights in the same channel; a second channel is dedicated to the Sun light.
Here are some examples of the light compositing module. In the first image you can see the result of the rendering process. You can open the light compositing mask when the rendering is open by selecting the command EXR light settings, available in the Effects section of the Ribbon.
In the next image you can see the result achieved decreasing Sun light intensity, and increasing the lamp light (chandelier) in the center of the ceiling:
Finally, here it is the room by night, that you will get switching off the Sun light (with the lamp still left with a low intensity):
Finally, in the next image, we left the Sun switched off, but increased the intensity of the artifical lights: this is a more realistic room by night effect.
Please note that the EXR multi-channel file can be opened and managed also with PhotoShop.
This article is valid for DomuS3D® 2018 and later versions