Tiles clip alpha

[Sebastian Silva]

Please advice how to avoid artifacts between tiles:

This happens to me on Chromium + WebGL but not so much on Firefox 57 Beta + Canvas.

Thanks!
Here's a link to the work in progress http://educa.juegos/dav/heroe/.index.html

[kittykatattack]

Here's how: https://books.google.ca/books?id=UR7UCgAAQBAJ&pg=PA29&lpg=PA29&dq=pixi+artifacts+tilesheet&source=bl&ots=MNNKXYLtOe&sig=4T6tNaWNUWauqKsVPZFnvxeg90o&hl=en&sa=X&ved=0ahUKEwiz6JLm3fjXAhXjx4MKHYTxCOoQ6AEITTAJ#v=onepage&q=pixi%20artifacts%20tilesheet&f=false