Const
Specifies which color channel to use for elevation data. Note that Alpha is not gamma-corrected, while RGB is. If you struggle with gamma applied to elevation values from a PNG, try using the alpha channel.
Fetch elevation from alpha channel of elevation texture.
Fetch elevation from red channel of elevation texture.
Concatenate bits from red, green and blue channels.
Specifies which color channel to use for elevation data. Note that Alpha is not gamma-corrected, while RGB is. If you struggle with gamma applied to elevation values from a PNG, try using the alpha channel.