Looks like a fun sim. WWII fighter setup?
Immersaview and Nthusim use the same core. That being said, In February-March Immersaview is adding another software engineer, so we should be seeing some new progress to things. Right now Nthusim 4.0 development is a bit stalled because of manpower being put on VADAAR development. It's where Immersaview is currently making their main income from. I've gotten the OK from management to push a new agenda that involves some vary major changes in Nthusim. Part of that will be rendering quality improvements.
My guess is that you're using Nthusim 3.4 for testing. 4.0.226 is a better basis to try things out. Blending should work just fine in demo mode. Are you sure you downloaded the Plus version? Standard is only for single projector use. 4.0 also adds WDDM desktop mode. I'm not overly happy with the rendering quality of text on WDDM mode though, so I'm pushing for an improvement of that in upcoming additions.
The current development version of 4.0 can be downloaded from:
https://drive.google.com/open?id=0B-Il4 ... TV0V0JxejQ
I'm curious, could you set your projectors to splash the default blue no-signal on the screen and photograph it? It'll better help me understand how much of the projection is splashing outside the usable screen area. That'll help me better evaluate the mounting location for your setup.
Random thoughts on warp software. Could you work with us to make a short list of what you like and dislike about warp software? Part of the new features under development can be directly influenced by feedback right now. User interface, the configuration mechanics and tutorial instructions are all subject to change based on any feedback you'd like to give. Ultimately, unless we make something people want, noone is going to buy it. Therefore, giving feedback will better help us towards that goal.
Thanks,
-Brad