<https://nch.invisionzone.com/topic/36463-colour-correction/#comment-96811>
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"Hi\n \n\n\n\tTo remove all colors apart from red ..\n \n\n\n\t\tLoad the clip\n\t \n\t\n\t\t \n\t\n\t\tClick the FX box on the timeline.\n\t \n\t\n\t\tChoose the Color Curves effect.\n\t \n\t\n\t\tClick the RGB box down chevron and select Green from the list\n\t \n\t\n\t\tGrab the top right end of the diagonal line (you will get a small orange circle) and drag it vertically down to the bottom. i.e. Make the line horizontal. This will remove all Green from the image leaving just the Red and Blue components....\n\t \n\t\n\t\t \n\t\n\t\tClick the down chevron again and select Blue.\n\t \n\t\n\t\tAs before, grab the top right end of the diagonal line (you will get a small orange circle )and drag it vertically down to the bottom.This will now emove all Blue from the image leaving just the Red component which is what you are aiming for I think....\n\t \n\t\n\t\t \n\n\tAs Borate notes there is no Chromatic Abberation effect in VP but with a bit of fiddling you may be able to use the color curves effect on three identical clips copied above one another (Red/Green/Blue) combined with Position/Transparency/Color Curve (applied in that order) to possibly produce something similar but I am doubtful that it will look right. The problem here (I think) is that you can't add images together by the addition or subtraction of colors as you can in some graphic packages.  (I used both 3D and colour abberated images in Astronomy talks and these were made using a graphics program.) I may be wrong in respect of VPs capabilities however.  Here is the top full moon image \"played with\"......Not that convincing.......\n \n\n\n\t \n\n\n\tNat\n \n\n\n\t \n \n\n\n\t \n "
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