Hi OG56,

Thanks for your answer. The problem do not come from generating/simplifying the STL. The geometry is extremely complex and porous so that any STL is >1Go. The use of 2D image slices is much more adapted for such type of model. In comparison, a compressed 3D BW image 1000x1000x1000 has size ~10Mo (100 times less than the STL)

I have found a possible way, that may not be the most efficient but may work. The Zip format of old Phrozen printers contains a sequence of png images as well as a gcode file. Adapting this zip file and loading with chitubox to convert it into CTB may potentially work.

Best,
Joris