Even on completely flattened land, when trying to place the prebuilt coaster "Blue Hurricane" it says "Cannot build that here".
Heh, not the first time we've had a bug report for this particular track design.
Could you fill out the issue template, though? This could be relevant (Version and build of OpenRCT2, and your operating system.)
I just tested on 135cc10, and it turns out you need the no support limit cheat turned on to build the "Blue Hurricane" prebuilt ride. Is this intended?
It's possible this is a result of #12707 - @Fred-1044276 on the discord mentioned a few other rides which can no longer be built due to the collision box changes (at least Octivator, Bumble Bee and Deep Freeze). Or possibly not! Worth checking though.
- What version (including commit/build) are you attempting to place the coaster in?
- Do you have the no height limit cheat set?
- Do you have zero clearance turned on?
- Can you upload logs?
Where can I find those?
I am on the latest update of OpenRCT2, no cheats.
Actually, Blue Hurricane can't be built because for some reason, it defaults to the Corkscrew Roller Coaster ride type instead of the Hypercoaster it should be. Same with Monster Trucks (becomes Car Ride), Hyper-Twister (becomes Twister Roller Coaster), Classic Mini Roller Coaster (becomes Junior Roller Coaster), and the Spinning Wild Mouse (becomes Steel Wild Mouse). This is because these aforementioned ride types were previously part of "ride groups" that have since been removed by #12007, with these ride types becoming their own. I don't think it's a result of #12707 as that involves vertical loops. This issue involves something completely different.
That means, most prebuilts for the Hypercoaster, Classic Mini Roller Coaster, Monster Trucks, and Hyper-Twister that exceed their base ride types' support limits can only be built with the "Disable support limits" cheat on. However, I did check the Hypercoaster's u(####) designs from RCT1 (which are u(0092), u(0249), and u(Z000)), and they all still work fine as they correctly default to the Hypercoaster ride type. With that in mind, all RCT1 prebuilts that are either of the Hypercoaster, Hyper-Twister, or Classic Mini Roller Coaster varieties still work perfectly fine.
It's annoying that I have to use not just the "Disable support limits" cheat to build those prebuilts, but also the "Allow arbitrary ride type changes" cheat to change them back to the ride types they really should be.
- The version info can be found on the bottom left corner of the main menu.
- Cheats can be viewed by the following: Open the options menu, go to the "Controls and interface" tab (with the twin gears icon), and tick the checkbox next to "Chests" to show the button to open the cheats menu. To enable the no support limit cheat, open the cheats dropdown and select "Disable support limits".
- To enable the zero clearance cheat, follow the steps in (2) but select "Disable clearance checks" instead.
- You may be able to pipe the log output to a file and then upload that file to act as your logs; the exact steps to do so depend on the OS.
Here are screenshots proving that prebuilts involving the Monster Trucks, Hypercoaster, Hyper-Twister, Spinning Wild Mouse, and Classic Mini Roller Coaster are broken if they were built and saved before the ride groups were removed on July 16, 2020. Every prebuilt shipped with RCT2 that involves any one of these ride types (except the Classic Mini Roller Coaster as that was never in RCT2 vanilla) is broken.





Notice that they all magically revert back to their base ride types (Car Ride, Corkscrew Roller Coaster, Twister Roller Coaster, Steel Wild Mouse, and Junior Roller Coaster, respectively) instead of actually being their proper separate ride types (Monster Trucks, Hypercoaster, Hyper-Twister, Spinning Wild Mouse, and Classic Mini Roller Coaster, respectively). I used the "Allow arbitrary ride type changes" cheat to show the offending ride types that end up being used instead once these prebuilts have been placed down.
However, if you rebuild Blue Hurricane and the other affected track designs from scratch using the correct ride types and then save them, they can still be built normally.
Here's a zip file with the affected RCT2 base game prebuilts that I have fixed. I built all of them with the "Disable support limits" cheat on and changed them back to their correct ride types with the "Allow arbitrary ride type changes" cheat.

Here's Krypton Dips, now correctly a Hyper-Twister.
@Fred-1044276 Thanks for the investigation, that has helped a lot. A fix is now pending.