I mean getting real textures from real trains on youtube videos. I just took a screenshot of a clip from an M8 in youtube, then put that same screenshot in paint.net. Once that screenshot from the youtube video is in paint.net, I crop the part of the image that I want. Then I put that cropped image in sketchup so I can use it as a texture for my Sketchup project. I never really thought of this but that is another good reference. Now I think what I have to do is find a good video at 720p or 1080p that has exactly what I want.