Sebastian König presents a new videotutorial for cmiVFX.
I would like to announce a new Blendervideo in the cmiVFX store:
Blender Greenscreen Keying Concepts.
After integrating CGI into camera-tracked footage in my last “Blender 3D Compositing” video this time it’s all about integrating greenscreen footage into CGI or other footage. It’s a cmiDirect, which means it is shorter (almost 2 hours) and covers keying, custom-keyers, channel-operations, lightwraps and some other compositing techniques.
Standard Keying Tools
There are various keying nodes available in Blender’s node-editor. Often people try to use the color- or chroma-key, which surely are useful in some situations. The best key however is the channel-key, which is able to create decent mattes with fine edges. In this video you will learn how to use the channel-key to get a solid alpha-channel instantly, but also how to enhance and preprocess your footage to improve your key and create a smooth edge with lots of detail.
When the standard keying-nodes are not enough, you can still build your own keyer to fit your needs. Separating an image into different channels gives you a lot of control over each color and with some pixelmath and rewiring you can come up with your own selfmade keys that sometimes work better and give more detail than the off-the-shelf solutions. Combined with garbage-mattes and rotoscoping you can solve even difficult shots with motion-blur, reflections and unevenly lit greenscreen.
But even the best alpha-channel will not help if your image suffers from color spill and doesn’t integrate well into the background. This video will show you how to enhance DV-footage to improve your key, how to get rid of color-spill and how to apply techniques like lightwraps to really integrate your keyed footage into the background.
Once your key is ready you can either work with that directly in the compositor or save your keyed footage and use it in another composite. In the last chapter you will learn how to do that and how to apply some little post-processing tricks.
The price is 19.95$. More information at the cmiVFX site.