Custom Textures from PartDesigner Not Importing

[Benseghir]

When I create custom parts in PartDesigner and add a texture, the textures don’t seem to carry over when I import them. I believe this worked in an older version.
I’m still fairly new to Blender and don’t really know how to apply textures manually within Blender to fix this. (Slightly off-topic, but I’d also appreciate any tips on how to do that, since I can’t even seem to find a UV map. Totally fine if you’d prefer to skip this part, though.)

[cuddlyogre]

The spec for stud.io textures has been pretty difficult to nail down. I've found 3 or 4 different ways a texture can be defined in a part and when I implement one, it seems to break another. If you could attach the part file that you are importing into Blender, it would help me troubleshoot.
Here is a tutorial for UV unwrapping in Blender https://www.youtube.com/watch?v=J7iZd6mv7VA

[Benseghir]

Well, lately I've been trying to import some eye pieces with better quality into Blender. The files I attached contain two rows, a row with an okay amount of polygons that are "supposed" to be textured but don't import correctly into Blender. Another row which has more polygons that I haven't managed to texture in PartDesigner for whatever reason which you can dismiss. Both rows are custom pieces instead of the ones present already within Bricklink Studio, the shapes do get imported but the textures of the first row don't.

(Apparently GitHub doesn't let me attach .io and .ldr files so here's a link instead: https://drive.google.com/drive/folders/1HWbkUphg3LTlZNc2Bn4MfIO9CgHLXXjx?usp=sharing )
Also thanks for the tutorial!:)

[Benseghir]

Huh, it somehow worked this time? Even the piece I sent at the very beginning imported correctly... weird. The minifigure head didn't import correctly but there's still some texture. Not sure what have I messed up.
(EDIT: Oh and I didn't notice that the ball piece didn't show any texture as well.)