Heres the link to the page: http://graphics.uni-konstanz.de/~luft/ivy_generator/
And quoting Drea, I put the important Vue notes she made that I use:
All of her post can be found here: http://www.yurdigital.com/forum/software-forums/vue/ivy-generator-free-tool-boost-your-forest-ruins
In Material Editor:
- If wanted, add bump map to the color map and
- set bump to 0.8
- change highlight color to a light gray
- add backlight between 95% and 100%
For textures I used a picture I took of a ivy in a trip to the UK. It is from the Lake district near Keswick. You are welcome to use them for free if you want. You should be able to right click and download the full size. In Vue I change the trunk texture into the mossy green or something else.