add loading from json

shaders/spark.fragment

@@ -0,0 +1,8 @@
+#version 120
+varying vec2 fTexCoord;
+uniform sampler2D Texture;
+void main() {
+    vec4 col = texture2D(Texture, fTexCoord);
+    // простой аддитивный блёк
+    gl_FragColor = col;
+}