Render without Anti-Alias?

[Rob Charlton]

I'm an After Effects newbie.

I'm using AE to create 256 colour animations for use in a Windows application. They need to be rendered with a magenta background to appear as transparent in the application.

I've composited a number of photoshop laters together with a magenta background, but when I render the magenta gets anti-aliased with the rest of the animation. I need a pure magenta background.

When I render using draft quality I think this stops, but my animation looks very rough. Is there any way to turn off anti-aliasing - maybe just with my magenta layer?

Thanks in advance.

[Rob Charlton]

By the way I'm using AE 4.1

[grinner]

Are you making animated gifs? If so, dithering will create some dottage in it.

<http://grinnerhester.com/forum>

[Rob Charlton]

Ah I see, I think I follow. It will actually be output on a Windows dialog background - which can be any colour the user has picked in the control panel, but grey may be a good enough guess.

I didn't think I could have an alpha channel since its only 256 colours, but I will look at the levels area to see what I can find.

Ta.

[Zap Andersson]

What background will it ACTUALLY be output on?

My suggestion is to render against that background, with an alpha channel.

Then use that alpha channel together with "levels" to set magenta to those pixels whera alpha is *precicely* zero, and not to others.

/Z

[Zap Andersson]

Just what I guessed.

Make your comp on a "default windows dialog gray" background.

Now if you aren't actually using this gray colos in your animation itself (or if you always want it to be "background") then you could possibly color-key the *exact* gray shade to become the magenta you search for using one of the keying options.

/Z