Recently, I got a problem with CLI ionic resources command, I want to generate a new splash screen,but it generate from cache, and the cache image have some damaged, so how should I clean the cache? or what can I do ?
try running
ionic state reset
it will reinitialise all stuff
@bengtler nope, it doesn’t work.
You can delete the images and run ionic resources --force
@mhartington it doesn’t work 
maybe your original image is broken?
it looks like a timing problem --> the process to create the image finished before the image is finally ready
I think image is fine, all problem is, that images generate from cache, not from ionic server.