9.5.2

34 • CHAPTER 2
VIEWS AND VIEWPORTS • 35
Transparency (OpenGL only)
Denes the transparency of the background picture.
Alpha Mode (OpenGL only)
If the background picture has an alpha channel you can use this setting to specify how the alpha
channel should be evaluated.
 None
The alpha channel is ignored.
 Normal
Uses the alpha channel to mask (i.e. hide) parts of the picture.
 Invert
Same as Normal except swaps around which parts are masked and which are
displayed.
World Grid
This is where you choose the properties of the world grid, which is also the default construction plane
and is displayed in all views by default. When enabled, this gives you a working grid within the various
2D and 3D viewports. It also displays the world axes.
Enable
Here you can enable or disable the world grid. Remember that you may have one or more construction
plane objects in your scene as well, in which case you will still see a grid on your display even if the
world grid is disabled.
Grid Spacing, Lines
Grid Spacing is the distance between grid lines.
Lines enables you to choose the total number of grid lines (stretching over the X-axis and Z-axis);
the default value is 100 m. When you choose a higher value, the grid will extend further towards the
horizon. This setting is only relevant in the perspective views.