Thanks for your comments Wingshaw, you've been a massive help to me so far! I'm currently using City Designer 3 with CC3+ but I'm starting to feel like the symbol sets are a bit restricted. For instance, the jetty is actually the only one within the software. I imagine I'll have to either find some more symbol sets or create them. There's plenty for me to do for now, and hopefully I can either add some finishing touches with CD3 or export to GIMP and see if that can help me.