Thanks Roeland !
Problem with obj saved as macro (ocm).
Since Instances are available, I save many obj as macro ocm, in order to use them as instances. So far, mainly for cars, detailed buildings and city props.
I am used to create the files in 2.58e and use them in a version allowing instances : 3.01-3.03.
In 2.58e, When loading an ocm file containing a saved obj, Some textures give an error message about wrong image format, whatever be the format used (tried with bmp, png and jpg), and most materials are broken : specularity set to default 0.5, smooth has been disabled...
In 3.03, with the new embedding system, I don't get error message at loading, but I encounter an other trouble :
I know that some changes have occured with specular materials, but weird things happen when saving and loading macros :
Previous scenes made in 2.58e and saved as ocs load and appear correctly in 3.03. Sames scenes made in 2.58e and saved as ocm appear with weird aspect on transparent specular materials : looking completely dark, and requiring an alpha adjustment to allow some light passing through.
This adjustment may be normal according to the modifications in the specular material shader, but the weird thing is that the loaded ocs doesn't require any adjustment and looks exactly as it was saved. The trouble appears only with the ocm.
The modified file has to be saved again as a macro ocm inside 3.03 to be usable. I have to fix all my previous ocm !
French Blender user - CPU : intel Quad QX9650 at 3GHz - 8GB of RAM - Windows 7 Pro 64 bits. Display GPU : GeForce GTX 480 (2 Samsung 2443BW-1920x1600 monitors). External GPUs : two EVGA GTX 580 3GB in a Cubix GPU-Xpander Pro 2. NVidia Driver : 368.22.