ty so much for your answer

i report the 2 mods again how you say above

Two mods "ETS2 [Trailer] Concrete Barriers"
and "ETS2 [Trailer] Umbrella Cargo" was make hidden by Steam

Steam Message:
"This item has been removed from the community because it violates Steam Community & Content Guidelines. It is only visible to you. If you believe your item has been removed by mistake, please contact Steam Support."

I write to Steam Support for more information and when i have it i will inform you for results :)
For now that mods are not use in Steam -.-
but lets wait Steam answer before we do more conclusion :)

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1693861731

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1692691578

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=1690106360

sry idk why steam dont show me you write in topic ... anayway invite is send :)

Don't get me wrong, but i cant get what is my part here :)

What are your plans and ideas?

You can follow that:
http://modding.scssoft.com/wiki/Tutorials/SCS_Workshop_Uploader/How_to_upload_new_mod%3F

if you want .zip your mod and give the link to can look what is the structures inside
and what can be the problem

add me like friend if you dont want to post link here

hmm check the values of that .mat in blender again, maybe it have something wrong

open that file "a3e45782c306590f7bb531b1e4fd09185c5ed3.mat" look how is inside
i guess it is the shadow texture for trailer :)
then check all setting for that in blender
be sure .tobj go to right texture .dds or .tga

sometimes when you ave more then one look you need to do it for both looks

i cant say much, becouse idk what is the mod and what you do :)

what you do with that file ui_shadow.pmd? You edit it in blender too?

P.S open texture .tobj file in notepad++ and read what is file name

nah, sry -.-
i dont follow so much other mods :)
usally i just make that i need whahahah

P.S but ofc it is good idea to ask on SCS forum or here on Steam ETS2 discusion
SCS Forum[forum.scssoft.com]
ETS2 Steam discusion