It could be the size that’s the problem, yes. Without realising it, Tiled 1.10 got a rather small image allocation limit because it switched to a newer version of the Qt framework it uses.
This will be fixed in the next release. For now, you have three options:
- Download one of the nightly builds from GitHub, which already have this fix in place. You will need a GitHub account to download builds.
- Downgrade to 1.9.2 until 1.10.1 comes out.
- Set the environment variable
QT_IMAGEIO_MAXALLOC
to0
to disable the limit in your existing version. This is done in your OS, not in Tiled, and will apply to all Qt programs you use.