Add color blending

enkou-shaders/src/rng.rs

@@ -14,6 +14,8 @@ use rand_xoshiro::Xoshiro256StarStar;
 /// This function assumes a properly-initialized state array;
 /// output may silently degenerate if the initial state is all zeros,
 /// so this module is private to the crate.
+// Temporarily unused, will be required once the main image accumulation entry point is implemented
+#[allow(unused)]
 pub(crate) fn xoshiro256starstar_from_seed(
     rng_state: <Xoshiro256StarStar as SeedableRng>::Seed,
 ) -> Xoshiro256StarStar {