RGBA
Taught to me by Hemal Shah.
The A in RGB is for transparency.
it doesn’t really matter for cameras. It’s useful in games, where a particular material is semi-transparent, so the color is merged with the thing behind.
From a Performance Perspective
We can also use RGBA because it is more Memory Aligned, because each channel is 1 byte. 3 bytes is not aligned, you want 4 bytes, so you get 32 bits.