You can make any modifications you'd like to the scan images in your project. After you take a scan and save your project, just look for the images called "projector-color.jpg" and "projector-color1.jpg" in the project's "scans" folder. "projector-color" is what is shown when the Scan Brightness Slider is set to 0, "projector-color1" is what is shown when this slider is set to 1. The images are blended linearly when the slider is in between.
To edit the scan, just open one/both in your favorite image editor and save them when finished. Lightform Creator will automatically pick up the changes and re-load the images (if for some reason it does not, simply re-load the project). Below are a few examples for how this can be useful.
If the selection tools aren't working well, try adding contrast/edges to the scene. Here the user is making magic wand work much better by adding a single line to the scan image:
In this example, text is added to the scan image. This allows Lightform Creator's effects to interact with the added text, for example to trace the edges of the text:
This final example shows more advanced usage and *only works for 2D scenes* (posters, paintings, etc). This example is showing how to replace the main content in a scan with a higher resolution and higher quality image of the scene captured from a DSLR (could also work for phone cameras). In this video, the scan doesn't turn out perfect because of the glossy/reflective material on the poster. While tedious, by overlaying a higher quality image, you can manually fix these quality issues. Note that in the video, the user is viewing the image at half-opacity to make sure that it lines up perfectly with the underlying scan. This is critical, because if there is misalignment, the published result will also be misaligned.