Learning about camera setting in Render
Creating and positioning camera
As a virtual object in Render, camera will not making any affect to the object in the scene. In the other hand, as a media for us to receive visual information, the setting of camera will affect our observation on the scene or certain object in a large extend. Let’s say there’s an elaborate designed scene. If observing from a proper view, you could fully feel the design idea and sense of aesthetic. But observing from an improper view, you’re not only losing the enjoyment of beauty but also can get correct information of the scene.
Here, we use a demo scene to explain several important parameter setting techniques.
a. Camera height
b. Horizontal focus setting
c. Non-horizontal focus setting
d. Product close-up
This is a common camera view, the height of camera and target are both 1300. This is similar to normal human eye height. This view will be accord with human feelings, but we don’t suggest this height for reaching a beautiful rendering. It will make viewer feel flat for they cannot feel the room structure is extending from this height.
If we adjust the camera height exceeded half of the room height, let’s say 1500, then our focus is on the lower half of the view. And viewer will feel empty on the top half of view. Finally the proportion of the whole scene will be discordant.
The angle of view from image above is much better for the purpose of display. It brings viewer a feeling of looking up. And it shows the room structure is extending on height and depth. Meanwhile this height will make viewer feel more relax because it is similar to the eye height when people sit down.
Horizontal focus setting
Normally, we will set a relatively small focus value to extend the depth of field and make the room look larger; yet, when we look into the detail, the furniture at the lower right corner, such as the end table and the sofa, have been stretched to an inappropriate proportion. For displaying the overall design, such kind of distortion doesn’t matter a lot, however, for displaying a particular product, this is an intolerable problem, and we will give you a proper solution in the following chapter.
The end table and sofa have much less distortion when the focal length is 18 (right) than when the focal length is 30 (left).
Non-horizontal focus setting
When using down-looking view, small focus value will lead a tilting illusion that the furniture appears inclining to one side, especially for to the furniture on the side, and this will cause a unstable feeling that the furniture is sliding down to one side.
The tilting illusion will be less intense when the focus value is 18 (Right) in compare with when the focus value is 25 (Left).
Take a look at these two images, the plant in the left image appears leaning to the left, and the black sofa stool is also strangely stretched. For product display purpose, this is inacceptable.
The focus of the left image is 25, which is already enough for showing the overall design but is not quite suitable for displaying a particular product.
When we adjust the focus to 50, as you can see in the right image, the distortion of the plant and the sofa stool has been modified significantly.
In conclusion, to obtain a good product close-up, normal focus is not a good choice, which will lead to obvious deformation, and by increasing the focus value greatly, this issue can be improved.