Create and manage focusing blurs

During our animation, all the planes seen in the 3D view on the previous page are in focus. However, to create a more realistic effect, you may wish to create a camera focusing blur effect.
You will therefore have to go back to the View tab and adjust the Focusing distance (i.e. indicate at exactly what distance the camera will be focused).
If you have followed all the steps of this lesson, the bird will be at a distance of 1000 units from the camera and your focusing distance is also 1000 units.
The bird is therefore in focus. In order to blur the other elements (mountain, forest, trees…), the Depth of Field parameter will need to be increased (when at 0, no blur is applied). This is illustrated by the creation of a red cone in the 3D view (see below) and a blur on the screen.

The further the objects are away from the apex of the cone, the more blurred they will be. Inversely, the closer they are to the apex of the cone, the slighter the blur will be. In the diagram above, the blur is applied to your plane either inside or outside the red cone. The width of the cone only indicates the blur amount.

If your focusing distance is now 3000, your camera is located at 1000 units from the center point and the mountains are 2000 units on the other side of the center point (1000+2000=3000), the mountains will be focused and the other planes will be blurred.

Considering the position of the cone in the 3D diagram, it is also safe to say that the closer the camera comes, the more the image will be blurred.

The focusing plane is also visible in the perspective view and in the front view in the form of a gray rectangle.

In the case of the perspective view, you will see a gray «viewing angle» at the focusing distance.

The Blur parameter present on each plane of the Plane tab is used to adjust the blur for each plane individually. It is expressed as a percentage of the blur generated by the Depth of field effect parameter.