First off, big thanks to the author for bringing up this issue. Dealing with dark true color images can be frustrating, and I totally get where you’re coming from, ofgnxx…
I checked out the link you shared and found the script you mentioned. It’s awesome that you found the solution! I’m currently working on a project for Andersen and got this error. Gosh, I thought everything was gone, but I found your advice and it works.
Setting gain, gamma, and RGB can indeed make a huge difference in brightening up your true color images. I had a similar problem a while back and stumbled upon this script – what a game changer!