🔧 Fix straight alpha

src/shaderSnippets.js

@@ -55,7 +55,7 @@ function math2D() {
 // compositing color values in the shader in the same way.
 function compositing() {
   return `
-  vec4 blendOver(vec4 over, vec4 under) {
+  vec4 alphaOver(vec4 under, vec4 over) {
     float alpha = over.a + under.a * (1.0 - over.a);
     return vec4((over.rgb * over.a + under.rgb * under.a * (1.0 - over.a)) / alpha, alpha);
   }