Hello there,
it seems that Tile Generator is miss behaving in c4d, returning overlapping tiles if fed with an input image.
The same doesn't happen if it's used instead a splatter node, or if tile generator uses one of the internal shape.
Following image shows the problem:

First node: splatter node with shape node as input = returns correct tiling in c4d
Second node: tile generator with shape node as input = returns wrong tiling (as shown) in c4d
Third node: tile generator with internal pattern = return correct tiling in c4d