No, only joking.....you know, funny faces.....
I don't seem to get that on my map. Attached are the folders from my Custom Assets. I have the Mine part working in CttR. The RRT_Depots XML part S/B:
<Depot>
<szName>Copper Mine Annex</szName>
<szModel>Copper_mine_annex.kfm</szModel>
<szCreateKFM>copper_mine_Annex_Creation.kfm</szCreateKFM>
<InfluenceRadius>500.0</InfluenceRadius>
<IsAnnex>1</IsAnnex>
<BuildCost>25000</BuildCost>
<fScale>1</fScale>
</Depot>
The Ore Cars S/B:
<TrainCar>
<szName>Copper Ore Car</szName>
<szGood>Copper Ore</szGood>
<szModel>CopperOre_Car.kfm</szModel>
<szDummyModel>CopperOre_Car_dummies.nif</szDummyModel>
<szIcon>ICON_Car_Coal.dds</szIcon>
<szGroundClackSound>AS3D_CLACK_PLANET_GROUND</szGroundClackSound>
<szBridgeClackSound>AS3D_CLACK_PLANET_BRIDGE</szBridgeClackSound>
<RunLength>30</RunLength>
</TrainCar>
As to the Icons, that may have been because I'm working on six + cars and probally didn't have the car icon TGA in those files. They're included in the following folders. I have them in a central spot in my working file. SBT
The copper Cars will look a bit funny as I just looked at them in-game myself and the ends need to be Alpha'd. Not sure how to do that in a non-icon file, or even why it came up that way as it's a edited copy of the Paper Car..........
The only way I can think of as to how the depot came up is maybe how you edited the files. The Copper Mine Museum Annex uses a Depot..... but the Copper Mine Annex is nothing but an edited Coal Mine Annex.
Look it over.......

I'm correct 97% of the time..... who cares about the other 4%....