Dualdisplay projects to be presented on two video projectors via one graphics card require the Pro License or a Wings Vioso Dual license. See also Versions and Licenses.
For a soft edge projection, the video projector overlap areas must be provided with gray scale for a seamless transition. This is done by the graphics card during playback and can therefore be adjusted at any time via a ramp/curve.
And this is how it is done:
Align the projectors so that the projected partial images match. To do so, project a test picture showing a grid or pattern, by positioning the locator on the picture object and starting presentation mode by pressing the F5 key. It may take a little while until the picture appears on both video projectors.
Information on how to create appropriate test charts can be found in the Multidisplay workshop under Aligning video projectors and adjusting softedge masks items 1 to 6.
The overlap can be adjusted best when the softedge masks are disabled. To do this click trigger Softedge Off on the Control Panel (located next to the Audio level).
In addition to the projectors you should also use a control monitor for Wings Vioso to facilitate the adjustment.
Click category 
Screens in the Media Pool and the screens will be listed on the right.
Click the corresponding screen on the right, following which the tabs for Softedge masks will appear in the Properties Table.
Click on tab Softedge Mask and the corresponding gray scale and ramp band will be displayed.
Now set a "Spline" node. Enable tool 
Spline Keyframes by holding the O key down and set a node by double-clicking the ramp band.
Check the exactness of the image overlap once again. Click on tab 
Control Panel followed by clicking the button in the control panel field Softedge off. Start Presentation Mode for the test picture to be projected. As the softedge masks are now hidden, you can easily judge the alignment and optimize it, if necessary. Click the button in the control panel field Softedge on in order to reenable the softedge masks again.
By moving the node, adjust the ramp until a homogenous overlap is displayed on the screen. In order to see the result on the screen you need to have Presentation Mode on. Use various motifs to judge the alignment, possibly showing homogenous surfaces and various brightnesses.
The homogeneity of the overlapping area can only be judged properly if the overlap of the pictures has been accurately aligned.
For evaluating the overlap, you will find a few test images in the Wings Vioso RX program folder, which is usually located at ...\My Documents\AV Stumpfl\Media Samples/Test charts.
You can copy the softedge mask curves from existing projects and paste them into other ones. Right-click the window containing the mask and select Copy or Paste.
See also