Redid alpha-render-handling (-> grey eliminated)

Particlesystem now looking like in particle creator. -> All effects have to be redone

app/build/intermediates/assets/debug/shader/entityFragmentShader.glsl

@@ -20,6 +20,7 @@ void main() {
     vec2 texAtlasCoords = getTexCoordsInAtlas(clampedTexCoords, texAtlasIndex);
     gl_FragColor = texture2D(texture, texAtlasCoords);
     gl_FragColor.a = min(gl_FragColor.a, alpha);
+    gl_FragColor.rgb = gl_FragColor.rgb / gl_FragColor.a;
 
 }