Color Keying/Chroma Keying
If texel color falls in user-specified range, then don’t apply texel to the fragment
- Allows regions of texture to be transparent to underlying image
- User specifies high, low color values
- Reject texel if low color <= texel <=high color
Method differs if texture is palletized or non-palletized
- Chroma Keying for palletized textures
- Color Keying for non-palletized textures