Art Tevs wrote:
- then I have specified some kind of extra pre-draw callback for this special 
repeatable group node (by placing empty drawable under that group), which is 
active only on iteration >= 2. In this callback I reset textures to the shaders 
accordingly to the output of the very last node in the repeatable subgraph. This 
yields to a connection of shaders in the beginning of a loop with the output of 
the last element.

That's kind of a cool solution!
   -Paul
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