You must have something wrong in your LDraw library, your "Empty.ldr" file renders fine here with all variants of 15068.dat.
Nonetheless, I noticed something weird: I had a copy of 15068p04.dat in the temporary folder where I put the model file. And though the copy had a regular part header (albeit unofficial) and despite the part beeing also in my LDraw library, it was treated as a submodel instead of a part. Is there a good reason for this behaviour?
Nonetheless, I noticed something weird: I had a copy of 15068p04.dat in the temporary folder where I put the model file. And though the copy had a regular part header (albeit unofficial) and despite the part beeing also in my LDraw library, it was treated as a submodel instead of a part. Is there a good reason for this behaviour?