September 07, 2011, 01:22:48 am
Does this happen if you export from Max with OpenCollada (recommended exporter for import to Lumion, note not the Autodesk Collada) rather than 3DS? Alternative also FBX.
Also, can you read the 3DS file with all materials and textures in some other 3D viewer or tool such as RH Deep Explorer, or even re-import back into Max?