Figure 6.15 - Transparent option

The JPG format used by Blender doesn't support transparent

backgrounds, which will add a solid color instead of transparent pixels

as a background in case you save the render results in JPG format.

6.5 Environmental lights

One of the first steps many artists take when starting to work on lights

for a scene in Blender is to add an environmental light. That is a light

coming from a scene's background, which could add a significant

amount of energy to the entire 3D space.

For that purpose, we can either use a plain color as the background or

add a special type of textures like an HDR image. An HDR texture is

useful for your environmental lights because: