Displacement isn't going through the characters feet either when I do use the DD materials.

Quote - OTOH I dont know what those brown squares are supposed to be.. not sure if it's an error or they're supposed to be there - this is the first time I've used the Sand texture...

I'm getting the same when I do use IDL in P8, but they're black. I'm assuming you rendered with Indirect Light on? When I switch off IDL the squares are gone. I'm wondering if they are shadows cast from the Skydome, which do not turn up in regular renders, but are visible with the indirect light renders. I've noticed it doesn't appear with every skydome/light set used, only certain ones, but I don't recall which ones.

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk