I'm having issues in 1.2.9 with Slic3r positioning all objects at z=0.
This is a problem when loading AMF files with multiple materials for dual extruders.
Slic3r's 3d preview appears to position the materials correctly, but the generated g-code, and slic3r's preview output, is positioning both materials at z=0, embedding one in the other.
Am I doing something wrong?
Screenshots