Repro steps:
1) Create a character from one of the high quality cc3+ characters, e.g. CC4Camila
2) Add clothes, hair, eyebrows, wrinkles, etc.
3) Export the character to fbx
4) Open the .json file that is created in a text editor (example json file is attached)
5) Search for "png_"
6) You will find *several* strange texture filenames, for example, this is the HDRP node of the Std_Eyelash material!

"HDRP": {
"Texture Path": "./textures/CC4_0000/CC4_0000/CC_Base_Body/Std_Skin_Head/Std_Skin_Head_MetallicAlpha.png_HDRP.png"
}

Note that this texture is NOT related to the Std_Skin_Head material as the path would suggest.

Expected Behavior:
- Texture filenames should be related to the materials in which they are used
- ".png_" extension should not be embedded in the filename
- Textures should be stored in correct texture directories
- For example, the above path should be:

"HDRP": {
"Texture Path": "./textures/CC4_0000/CC4_0000/CC_Base_Body/Std_Eyelash/Std_Eyelash_HDRP.png"
}

More information:
- I've created 35 characters and exported them. This results in 395 bad texture files. The list is enclosed in the attachment along with a sample json file.