New method for Image Texture node projection

When using image textures, we often face the tile repetition issue. So we have to make the texture seamless with external apps, or make a texture coordinates scrambling nodetree, or just discard UV and go for box mapping which has that cool blend option that blends the texture in the three projection axis...

But often what we need is just to avoid the clear straight tile seam, a matter of few pixels. Being the "blend" code already in there for box mapping, I thought that a new method could be put into the Image Texture node: Repeat overlap!

What it does is to repeat the texture (as repeat method does) but overlapping the tiles and blending just that much. A blend (or overlap) factor would tell how far the tiles should overlap.