Propogated scattered_color changes down book 3

Author: trevordblack

books/RayTracingTheRestOfYourLife.html

@@ -3171,9 +3171,11 @@
             ray scattered = ray(rec.p, p.generate(), r.time());
             auto pdf_val = p.value(scattered.direction());
 
-            return emitted
-                + srec.attenuation * rec.mat->scattering_pdf(r, rec, scattered)
-                                   * ray_color(scattered, depth-1) / pdf_val;
+            color scattered_color = (srec.attenuation
+                * rec.mat->scattering_pdf(r, rec, scattered)
+                * ray_color(scattered, depth-1)) / pdf_val;
+
+            return emitted + scattered_color;
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ C++
         }
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