Or alpha test.
There are some builtin shaders that do this, but the general idea is to check the alpha value of the texture (which goes from 0% to 100% from one side to the other) and compare that value with a float property (driven by your player’s HP). If it’s less, output 0. If it’s more, output 1.
It tends to leave a jagged edge, though, which is one of the reasons I created these shaders a number of years ago. It treats that boundary a little more fuzzily so that any imperfections in the texture are blurred out, as well as allowing for edges that aren’t completely hard. I tend to get the best results with a blend value of about 0.02; small enough that some blurring occurs, but not so strongly that the data precision (i.e. the readability of the graphic) is lost. $2 asset is $2 because that’s the lowest non-free price and anyone with understanding of HSLS can create the included shaders themselves in about an hour.
I’m not sure how ShaderGraph would handle this, if there’s already a builtin function for it (I’d be surprised if there wasn’t), but creating it manually with a few nodes should be easy enough now that you know what the process is.
