There are two ways that I know of to minimize the risk of printing.
1. Alter your clothing selection to mask the "line" and "bulge" via color, sizing (ie, go with a fuller cut [more "baggy"]). If you have solid colors for covering garments or they are tighter-fitting that will support proper coverage of the gun, then option 2 might be preferable. Broken colors work well, as do variable textures. (Sort of like camouflage netting breaking up the line, used during warfare.)
2. Kneel, don't bend. If you practice getting down to the ground via various movements, you should be able to find one that helps keep your strong-side leg/hip the straightest. You can simply keep the knees locks and bend over, but that's the worst for showing the butt of the gun. No variation of this avoids printing altogether. You can bend both knees, as well, but I don't find this method any better for avoiding printing. Or, you can bend the weak-side knee but point the strong-side knee straight down to the ground, which keeps that knee/hip in the same orientation as when you carry. The latter looks a bit funny, but it avoids printing.
I have altered my clothing to suit carrying, but also try to practice bending the weak side knee while maintaining a relatively straighter strong-side knee/hip orientation. In the event I must bend, I cover the strong side with the arm, or angle away from the sight line of the nearest people. It isn't fool proof, but to my knowledge I haven't been "made" yet.