Pictures of soldiers in Truppenversuch 1976

Anyone come across photos such as this one?

I've seen tons of pictures of the actual uniforms but never any of them being tested by German forces during the actual field trials.

Anyone know of any sources?

I have also never come upon pictures of these uniforms in use. The one you just posted is a reenactment photo in Peterson's "Wehrmacht Camouflage Uniforms and Post War Derivatives" book:

https://www.amazon.com/Wehrmacht-Camouflage-Uniforms-Derivatives-Militaria/dp/1859150055

At the time of publication this was pretty much the only book to have the uniforms pictured. For the most part the information in the book has held up pretty well, though some of the information is inaccurate.

Steve