I too wanted to figure out how to post pics to this forum for future use (I'm a newbie to this forum). AND, I use google photo for my pics. Here's how I was able to post this picture of my work bench (see below).
1. Go to google photo site.
2. Open the specific photo you want to insert.
3. Right click your mouse on the photo displayed on your screen.
4. Choose option that says "Copy image address".
5. Next go back to VAF to your post and click on the "insert image" icon.
6. Right click and paste address into that box.
7. Click "preview post" below reply box and you should see your image in the preview before you send.
I also learned that if you hit the "share" option in google photo and hit the option to "get link" and copy THAT address, it will not work! I had to right click directly on the picture to get a web address that would actually load the pic.
Hope this helps!