From the course: Product and Architectural Visualization Techniques
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Using transparency and alpha channels - 3ds Max Tutorial
From the course: Product and Architectural Visualization Techniques
Using transparency and alpha channels
- [Instructor] A clear view of how transparency works is essential for post-production compositing. There are several different flavors of transparency providing different options. Alpha channels and premultiplication are the two main considerations with image transparency. Usually when someone says alpha channel, she or he means the transparency of a bitmap image. Technically though, an alpha channel is any auxiliary color channel that can store any arbitrary pixel data, and that's in addition to the familiar red, green, and blue color channels. Professional file formats, such as TIF and EXR, can include more than one alpha channel, and these can store any data, such as transparency or Z buffer depth. Consumer and web-friendly formats, such as JPG and PNG, either have no alpha support at all or only allow one alpha channel for transparency only. The bit depth of the channel determines the dynamic range and number of possible values. A 1-bit transparency channel only allows a pixel to…