I am often asked the question “What is the difference between a Straight and a Premultiplied Alpha Channel?”

In this tutorial I discuss the differences between a Straight and a Premultiplied Alpha channel.  How to spot the difference and ensure you interpret your files correctly when setting up your composite.

I also cover the Straight Alpha parameter that is offered when rendering Cinema4D Multipass renders.

Head on over to Vimeo to watch the tutorial in HD.

Here is a quick tip on using Preserve Transparency in After Effects.  An often overlooked feature, this little switch can sometimes be very useful when wanting to stack several layers and retain the transparency of the bottom layer.

Head on over to Vimeo to watch this in HD

Preserve Transparency In After Effects from Tim Clapham on Vimeo.