I have attempted to convert several files from .fbx to .3ds using the free online converter. The model itself transfers over well but the texture appears to be distorted in the final model. There might be an error in translating the UV unwrap information from one format to the other.
The first files I tried seemed mostly correct but the seams may have had too much padding. The most recent file attempts seemed to be distorted in a more unusual way, causing a waviness in the final result little relation to the original layout.
I tried again using an .obj file and got the same final result so it seems to be the conversion to .3ds because it doesn’t depending on the input file type.