BrianOD that's what I found searching on google because I needed to know it too.
Remember to have in mind the VRAM that every sprite uses too. With big backgrounds you have to be careful.
4000x4000 background will use:
4096x4096 (near pow of 2) x 4 (RGB) = 67108864 bytes.
67108864 / 1024 / 1024 = 64 mb.
... and Construct 2 loads your entire game in memory, so, if you have a racing game with 5 levels of 4000x4000 you will be using more than 320 mb of RAM always since start...
- IPAD 1 only has 256 mb of RAM, so it's impossible even if it would support 4000x4000 textures.
- IPAD 2 has 512 mb and iOS uses between 80 and 120 mb.