C4D透明通道问题处理教程 Helloluxx – Straight vs Premultiplied : Understanding Alpha Channels讲解C4D渲染输出透明通道时，直接输出通明通道和多通道合成的不同，直接输出有时会有黑边或者彩色噪点，怎么在AE中去掉C4D视频黑边等问题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.