diff --git a/src/regolith/regolith_subpixel_streamtube.f90 b/src/regolith/regolith_subpixel_streamtube.f90
index 9b873c0b..5b2458ef 100644
--- a/src/regolith/regolith_subpixel_streamtube.f90
+++ b/src/regolith/regolith_subpixel_streamtube.f90
@@ -50,7 +50,7 @@
 !  Notes       :  
 !
 !**********************************************************************************************************************************
-subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer,vmare,totseb)
+subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,vseg,newlayer,rm)
    use module_globals 
    use module_regolith, EXCEPT_THIS_ONE => regolith_subpixel_streamtube
    implicit none
@@ -58,9 +58,9 @@ subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer
    ! Arguments
    type(usertype),intent(in) :: user
    type(surftype),intent(inout) :: surfi
-   real(DP),intent(in)            :: deltar,ri,rip1,eradi
+   real(DP),intent(in)            :: deltar,ri,rip1,eradi,vseg
    type(regodatatype),intent(inout) :: newlayer
-   real(DP),intent(out)            :: vmare,totseb
+   real(DP),intent(in) :: rm
 
    ! Traversing a linked list 
    real(DP),parameter :: a = 0.936457 
@@ -68,24 +68,20 @@ subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer
    type(regolisttype),pointer :: current
    real(DP) :: z,zmax,zstart,zend,rlefti,rleftf,rrighti,rrightf,rc,vsgly,x
 
-   ! * Mixing 
-   real(DP) :: zmix 
-
    ! The depth that a stream tube dips 
    zmax = rip1/4.0_DP
 
    current => surfi%regolayer
    z = surfi%regolayer%regodata%thickness
-   zmix = z
    zstart = 0.0_DP
    zend = z 
-   vmare = 0._DP
-   totseb = 0._DP
 
    ! Two cases: subpixel is inside the first layer, and its volume is simply the landing ejecta blanket.
    if (zend>=zmax) then 
-      vmare = newlayer%thickness * user%pix**2 * surfi%regolayer%regodata%comp
-      totseb = newlayer%thickness * user%pix**2
+
+      newlayer%thickness = vseg
+      newlayer%comp      = vseg * surfi%regolayer%regodata%comp
+
    else
    ! The subpixel stream tube may dip deeper than the first layer. And we use the line segments approximation, but 
    ! the layer now intersects with both sides of a stream tube, so two intersection points between the layer and the 
@@ -112,6 +108,8 @@ subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer
      rrighti = eradi
      rrightf = eradi
      rc      = rip1 * sqrt(3.0) / 4.0
+     newlayer%thickness = 0._DP
+     newlayer%comp      = 0._DP
 
      do 
 
@@ -126,8 +124,8 @@ subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer
                  - tan(b/eradi * rlefti) - tan(b/eradi * rrighti)) - abs(b/eradi * rleftf + b/eradi * rrightf &
                  - b/eradi * rlefti - b/eradi * rrighti)) 
        
-         vmare = vmare + vsgly * current%regodata%comp
-         totseb = totseb + vsgly
+         newlayer%comp      = newlayer%comp + vsgly * current%regodata%comp
+         newlayer%thickness = newlayer%thickness + vsgly
 
          current => current%next
          z = z + current%regodata%thickness 
@@ -138,14 +136,16 @@ subroutine regolith_subpixel_streamtube(user,surfi,deltar,ri,rip1,eradi,newlayer
       ! final part of a stream tube 
       else 
          vsgly   = 0.25 * PI * deltar**2 * a**2 * eradi / b * (abs(tan(b) - b)) 
-         vmare   = vmare + (vsgly - totseb) * current%regodata%comp
-         totseb  = vsgly 
+         newlayer%comp   = newlayer%comp + (vsgly - newlayer%thickness) * current%regodata%comp
+         newlayer%thickness  = vsgly 
          exit
       end if
+
      end do
+
    end if
 
-   call regolith_streamtube_head(user,surfi,deltar,vmare,totseb)
+   call regolith_streamtube_head(user,surfi,deltar,newlayer,eradi,rm)
 
    return
 end subroutine regolith_subpixel_streamtube