This could happen for a few reasons:
⇒ The dot pixels don't reach the minimum light threshold: (see the value set in the setting windows)
→ Check if the projector brightness is high enough.
→ Check if you can increase the camera sensibility.
⇒ The ambient light is too high:
→ Keep ambient light as low as possible.
⇒ The camera resolution is too small:
→ The min. resolution is 1080px, but 2048px or more is recommended.
⇒ Be sure that most dots are visible from the camera.
Note: For the licensed version, you can see the last calibration pictures in the MyDocuments/NestMap/CalibPic folder. NestMap places a + where dots are detected and this could help to diagnose calibration problems.
If you have dots over an object that is not part of the screen, you can disable those dots by:
1. Right-click on the "show grid" button and select "Show Dots", this will show up all dots.
2. With the mouse, navigate through the projector's screens and click on the dots you want to hide (they should turn red).
3. Start a new calibration. NestMap will not project the disabled Dot on screen and will interpolate them with the surrounding dots.
Green dots are important and cannot be hidden.
If you get the correct blend with pure white, red, green, and blue, but not with Dark Orange, Sky Blue, or Purple, this is mostly caused by the projector's color mode or lamp aging. Try to change parameters in projectors. For example, try the "cinema" mode, disable Eco or dynamic brightness, white temperature, etc.
Sometimes it's just impossible to have a perfect blend for all colors with some projectors. In this case, adjust the blend with a bright still frame of your main movie to get the best results.
This could happen for one or many of these reasons:
⇒ Some display drivers use the "limited color space" by default, which restrains RGB values between 16-235:
→ Change the color space to "Full 0-255" could help.
⇒ Some projector technologies have higher black levels than others:
→ Try to fix it by changing projector settings, but maybe consider another kind of projector.
⇒ In NestMap V126.96.36.199 and above, you can use the "Black level adjust" slider if all other solutions are not enough.
⇒ In NestMap V2.0 and above, you can use the "Calibrate Black level after geometry" option to calibrate the black level with the camera. Adjust the number of passes until you have a uniform grey. You will need a low noise camera for a proper black level calibration, like the IDS or a Canon camera.
NestMap can only use Spout surface compatible with DirectX9. If you have this message, this means that the Spout sender uses a DirectX11 surface with a color space that is not retro-compatible with DirectX9.
Try to use the color format DXGI_FORMAT_B8G8R8A8_UNORM. If your project is in Unity, you could use this edited KlakSpout unity package which is already in this color format.
This message is poped by the Spout library and mostly occurs when the Spout surface is created on another GPU than where the main monitor is connected. If you have more than one GPU, please declare one of the projectors connected to the video card the Spout sender is using as the "main monitor" in Windows settings.