Tiling 4D Northern Lights! It's Ana.

Named after the fourth-dimensional direction from Fine Structure, which I think got the name from elsewhere. Ana and Kata are opposed directions on the w-axis.

assets/ana_fragment.glsl

@@ -0,0 +1,53 @@
+#ifdef GL_ES
+#define LOWP lowp
+precision highp float;
+#else
+#define LOWP 
+#endif
+
+// CC0 licensed, do what thou wilt.
+
+varying LOWP vec4 v_color;
+varying vec2 v_texCoords;
+uniform sampler2D u_texture;
+
+uniform float u_seed;
+uniform float u_time;
+uniform vec2 u_resolution;
+
+
+float swayRandomized(float seed, float value)
+{
+    float f = floor(value);
+    float start = sin((cos(f * seed) + sin(f * 1024.)) * 345. + seed);
+    float end   = sin((cos((f+1.) * seed) + sin((f+1.) * 1024.)) * 345. + seed);
+    return mix(start, end, smoothstep(0., 1., value - f));
+}
+
+float cosmic(float seed, vec4 con)
+{
+    float sum = swayRandomized(seed, con.w + con.x);
+    sum = sum + swayRandomized(seed, con.z + con.y + sum);
+    sum = sum + swayRandomized(seed, con.x + con.z + sum);
+    sum = sum + swayRandomized(seed, con.y + con.w + sum);
+    return sum * 0.25 + 0.5;
+}
+
+void main() {
+    if(texture2D(u_texture, v_texCoords).a <= 0.) discard;
+    // Normalized pixel coordinates (from 0 to 1)
+    vec2 uv = (gl_FragCoord.xy/u_resolution) * 6.283185307179586;
+    // Used to show that this tiles on x and y.
+    uv *= 2.0;
+    float aTime = u_time * 0.125;
+    vec4 s = vec4(swayRandomized(-16405.3157, aTime - 1.11),
+                  swayRandomized(-77664.8142, aTime + 1.41),
+                  swayRandomized(-50993.5190, aTime + 2.61),
+                  swayRandomized(-42069.1984, aTime - 2.31)) * 1.5 * (vec4(sin(uv.xy), cos(uv.xy)) + 1.25);
+    vec4 con = vec4(0.0004375, 0.0005625, 0.0008125, 0.000625) * aTime + s;
+    con.x = cosmic(u_seed, con);
+    con.y = cosmic(u_seed, con);
+    con.z = cosmic(u_seed, con);
+
+    gl_FragColor = vec4(sin(con.xyz * 3.14159265) * 0.5 + 0.5,1.0);
+}

core/src/main/java/com/github/tommyettinger/sonorant/ShaderNoise.java

@@ -57,7 +57,8 @@ public ShaderNoise(Clipboard clippy) {
 			Gdx.app.exit();
 			return;
 		}
-		shaderRidged = new ShaderProgram(Gdx.files.internal("foam_vertex.glsl"), Gdx.files.internal("sonorant_fragment_ridged.glsl"));
+		shaderRidged = new ShaderProgram(Gdx.files.internal("foam_vertex.glsl"), Gdx.files.internal("ana_fragment.glsl"));
+//		shaderRidged = new ShaderProgram(Gdx.files.internal("foam_vertex.glsl"), Gdx.files.internal("sonorant_fragment_ridged.glsl"));
 		if (!shaderRidged.isCompiled()) {
 			Gdx.app.error("Shader", "error compiling shaderRidged:\n" + shaderRidged.getLog());
 			Gdx.app.exit();