Hi PapaXpress, I'm excited to hear that you have that working. Indeed, laying track with RWDecal is great. It was hard for me without it because I didn't know where I should have different sidings... even using markers I've had to make lots of corrections in my track to better match the decals afterwards.
I'm in the same boat, with a ton to learn but having fun. Route design is indeed fun.
I'm not sure the "best" way to make an overpass/underpass. The snap-to-track/road (little horseshoe magnet icon) is very useful, and then using the "set height" and smoothing tools. When aligning objects, I've learned the keys f/g are useful for fine rotation, v/b for fine height adjustment and c/n for fine horizontal adjustment; thank you forum for that (among much else!)
With the track offsets for multi-tracks, move the arrows up to the end of an existing piece of track where you want to start so it snaps to the end. Then, click and
hold the primary mouse button, move left/right and the other arrows will move to the left/right of their original alignment, then release the button and lay the track. There has to be an original track that you're starting from, otherwise holding the primary mouse button and moving left/right rotates the direction of the start of track.
Yes... you can add more decals and they will show up in the list like your earlier ones, just use a different name for them unless you're overwriting your earlier decals.
Red