I've used the terrain tool a lot in my games and I was curious to see the updates in version 2018.3. I like the updates, but there's one thing that's been bugging me: I don't like this dropdown menu. I find that when I'm editing the terrain, I switch between the flattening, smoothing, and raising tools very frequently. Since those buttons have been replaced with this dropdown, switching between them requires two clicks, and they need to be more accurate than before. The use of text instead of icons also makes slower to pick out the tool you want to use. It's not a big deal. Maybe I could get used to this, but my first instinct is that this small change is going to feel very annoying. I understand that this change was probably made to facilitate custom tools (which I love) but I still think the UI could be improved. On the plus side: I'm really like that there's a custom tool API. To get around the annoyance of swapping between tools, I could easily see myself creating a master tool that uses a bunch of keyboard shortcuts to switch between modes. The API could be improved a bit, such as letting me modify the IOnPaint parameters manually from the inspector and letting me call Paint() from OnSceneGUI. I often want the different paint tools to remember the settings I used on them last. That would be something I'd want to build into my tool. Questions: 1. Is there any plan to update the UI for tool selection? 2. Will the Inspector Editor API become more flexible?