Hi,

I think this is a bug:

• create a simple cart:

function _draw()
    cls()
    spr(001,0,0)
end

• save it
• draw a painted sprite at position 001
• export the sprite sheet (do not save the cart!)
• load the cart
• run the cart, nothing is visible
• import the sprite sheet
• run the cart, nothing is visible!!! my expectation was that the sprite would be visible
• escape and switch to the sprite editor: no painted sprite at 001

• reboot

• load the cart
• import the sprite sheet
• switch to the sprite editor: painted sprite at 001
• run the car: visible sprite.

So it seems that switching to the sprite editor after importing a png does something that is not performed only by importing the png.