We found more bugs with the tool. We learned that we can upload strip in pixzels and it will generate 3D model automatically, and we made this archy wall. Then when we made another strip, it stop working. It won’t generate 3D model.
Hello IristoId.
Many thanks fro your feedback... Sorry for the late reply I was out tocuhing grass :)
I was trying to replicate your bug but I did not succed... I can upload many 6 sprites strip with no problem and even mix some different sprites and still keeps building... 
Maybe I do not understand your bug. If u still find this bug let me know... Intereted on crush on it :)
Thanks :)