Assistance with Retexturing Lvl 2 in the Game.

As mentioned in the topic name, any assistance or suggestions would be great. I'm having an issue with the I2_terra file as the message pops up "Only images with width and heights and powers of two are supported." I'm trying to replace the flag with another one.

file:///C:/Users/Motherboard/Pictures/Screenshot%202018-01-15%2018.02.34.png

file:///C:/Users/Motherboard/Pictures/Screenshot%202018-01-15%2018.03.27.png

We aren't on your computer right now, you know right?

Also, that means both have to be a multiple of two (e.g 20 x 18)

I've tried what you've mentioned (20 x 18 pixel is the image size) but somehow it still pops up regardless if it's the multiple of two.

file:///C:/Users/Motherboard/Pictures/Screenshot%202018-01-15%2018.02.34.png

file:///C:/Users/Motherboard/Pictures/Screenshot%202018-01-15%2018.03.27.png

You'll need to upload these with an uploading website such as imgur.

Also, that means both have to be a multiple of two (e.g 20 x 18)

I've tried what you've mentioned (20 x 18 pixel is the image size) but somehow it still pops up regardless if it's the multiple of two.

Images need to be in POWERS/EXPONENTS of 2.

An example would be:
1
2^1 = 2
2^2 = 4
2^3 = 8
2^4 = 16
2^5 = 32
2^6 = 64
2^7 = 128
2^8 = 256
2^9 = 512

So then you can take any of those numbers to make the image you want.