Premultiplication and unpremultiplication are essential concepts for any compositing artist to master. Premultiply refers to performing a multiplication operation on the alpha and color channels of an image. Unpremultiplying then, refers to dividing the RGB image color by the alpha. Without the proper use of these techniques, edge artifacts and/or incorrect color correction can occur. Continue reading
I have finished a tutorial on how to upsample images in Adobe Photoshop CC with the new ‘Preserve Details’ feature. Upsampling is the process of mathematically interpolating new pixels to enlarge images based on the pixels surrounding them. If this video helps you, be sure to leave a comment below.
AtomKraft is a fantastic plugin for After Effects. It provides an alternative to the native Classic 3D and Ray-traced 3D renderers, using a 3D unbiased renderer based on the Renderman-compliant 3Delight application. As such, it is really excellent at previz, making composites, and 3D motion graphics. It supports OBJ, Alembic, and RIB file formats. You can find out more at Jupiter Jazz, the makers of AtomKraft.
I have a set of tutorials about AtomKraft, although I apologize in advance for the poor quality. I will hopefully have a better series on AtomKraft 1.0 shortly.