Max's render to texture has always put the extra edge border around for me. Try changing the "Edge Padding" number in the RTT dialog window - I think default is 2, maybe you should try it higher. As for using Photoshop, you can do this using the Maximum (or Minimum, I always get those two mixed up!) filter. Just select…
Well you can just check pixel border and make sure it's on 2 or greater. Make sure not to save the preview that pops up, because it's a post effect, so it only shows up on the flat that got saved to your hard drive, not on the window that pops up. Also both Pior, and myself made photoshop actions that would do what you…
I wrote an Action that does it little differently, using the Minimize filter. I just fixed it, it wasn't using the blur, so I was getting stretchy pixel-smearing. Thanks for the blur idea. This one makes a 4-pixel border, as a new layer. You can use it if you like.…