Some tips about Blitz3D

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Beaker
 #1
It is always worth checking the result of any load (LoadImage(), LoadMesh() etc) command. Do it like this:
alienimagename$ = "myImage.bmp"
alien = LoadImage(alienimagename$)
If alien = 0 then RuntimeError "Couldn't load image: "+alienimagename
It will help you in the long run and will make users less annoyed. :)