Fans of the Activetuts+ Facebook page can now access a new bonus tutorial – in this month’s Facebook Fan Bonus, you’ll learn how to remove the background color from a sprite sheet using AS3, and blit the result to a bitmap canvas.
Final Result Preview
Here’s a look at the kind of effect you’ll be working towards in this tutorial:
Download This Fan Bonus Now!
All you have to do is Like us…
Not On Facebook?
Don’t worry, the tutorial will be posted on Activetuts+ in a month’s time!
Enjoyed this Post?
Subscribe to our RSS Feed, Follow us on Twitter or simply recommend us to friends and colleagues!
By Activetuts+ Editor
Join our newsletter!
Create a Tutorial, Get Paid!
Have something to teach the world? Want to earn money doing it? Tutorials, screencasts, and articles published here on Activetuts+ are largely contributed by readers just like you! We'll pay you great money for good content. Find Out More
1) Open in Photoshop or Gimp Shop
2) Click Magic Wand tool
3) Click the background area
4) Hit delete
5) done.
Well, that is one way. However, some artists like to keep the background color to make spiriting easier. Also, this method saves you from having to manually edit the image each time the artist updates it. I don’t have data on this but I believe having the Alpha channel in an image puts more pressure on the processor.
Is this method good, performance wise?
I think @hayesmaker example sounds better
Hey PIRATRIK,
I believe this is better performance wise, yes. The reason it might seem easier to just remove any colour using PhotoShop or Gimp is because you don’t see what Flash does behind the scenes. I think Flash does a lot behind the scenes when there is transparency on the image. All we are doing is a simple for loop :)