Fix color scaling with high iteration count

render.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"image"
 	"image/color"
 	"image/png"
@@ -47,7 +48,7 @@ func main() {
 	}
 
 	colorStep := float64(Iterations)
-	colors = interpolateColors("Hippi", colorStep)
+	colors = interpolateColors("Plan9", colorStep)
 
 	log.Fatal(http.ListenAndServe(":6161", nil))
 }
@@ -60,6 +61,7 @@ func computeThread() {
 				(float64(p.y)/Size+float64(p.tileY))/float64(uint(1<<(p.tileZoom-1))),
 			),
 		)
+		fmt.Println(val)
 		p.out.SetRGBA(p.x, p.y, colors[val])
 		p.wg.Done()
 	}
@@ -176,7 +178,7 @@ func mandelbrot(c complex128) uint16 {
 	for i := 0; i < Iterations; i++ {
 		z = z*z + c
 		if cmplx.IsNaN(z) {
-			return uint16(i)
+			return uint16(i * 1024)
 		}
 	}
 	return Iterations