diff --git a/src/consts.h b/src/consts.h
index d53abff..2686450 100644
--- a/src/consts.h
+++ b/src/consts.h
@@ -26,9 +26,9 @@ const float MAX_SPEED = 14.0f;
 
 
 // --------------------------- Raycasting Constants ---------------------------
-const int SAMPLES_PER_PIXEL = 1;
+const int SAMPLES_PER_PIXEL = 4;
 
-const float alphaAcumLimit = 1.0f;   // TODO: Atm, this does not work very intuitively, other parameters control transparency
+const float alphaAcumLimit = 0.4f;   // TODO: Atm, this only works with sigmoid
 const float minAllowedDensity = 0.001f;
 
 const float stepSize = 0.02f;
diff --git a/src/illumination/Raycaster.cu b/src/illumination/Raycaster.cu
index c9015cf..b2d1939 100644
--- a/src/illumination/Raycaster.cu
+++ b/src/illumination/Raycaster.cu
@@ -21,7 +21,7 @@ __global__ void raycastKernel(float* volumeData, FrameBuffer framebuffer) {
     float accumR = 0.0f;
     float accumG = 0.0f;
     float accumB = 0.0f;
-    float accumA = 1.0f;
+    float accumA = 1.0f * (float)SAMPLES_PER_PIXEL;
 
     // Initialize random state for ray scattering
     curandState randState;
@@ -77,6 +77,7 @@ __global__ void raycastKernel(float* volumeData, FrameBuffer framebuffer) {
           accumG = d_backgroundColor.y * (float)SAMPLES_PER_PIXEL;
           accumB = d_backgroundColor.z * (float)SAMPLES_PER_PIXEL;
           accumA = 1.0f * (float)SAMPLES_PER_PIXEL;
+          
         } else {
           if (tNear < 0.0f) tNear = 0.0f;