diff --git a/Data/Version History.txt b/Data/Version History.txt
index 9d14cac..54c4506 100644
--- a/Data/Version History.txt	
+++ b/Data/Version History.txt	
@@ -11,7 +11,9 @@
  -Preserve prefix and suffix fields between open/close of the Final Render dialog.
  -Entering xaos cells will always select the entire cell to make editing easier.
  -Allow right mouse drag + shift perform panning the same way middle mouse button drag does, for users without middle mouse buttons.
- 
+ -Miscellaneous OpenCL optimizations.
+ -Change Blur Curve math to be centered on 0,0 and create a more dramatic effect at lower values.
+
 --Bug fixes
  -Fix crash on palette editor when opening it with certain palette files in a particular order.
  -An xform with only a post variation in it might have rendered wrong.
@@ -20,11 +22,15 @@
  -Custom palettes were not being read correctly on non ANSI machines.
  -EmberAnimate.exe was using 1-based indexing for filenames, but Fractorium and all of the documentation was using 0-based indexing. Make all use 0-based indexing.
  -The left header column in the xaos visualization table had somehow disappeared.
+ -Fix  OpenCL compilation bug when using Depth Blur with AMD on Mac.
 
 --Code changes
  -Make all iterators on the CPU use a temporary point.
  -DoubleSpinBox now has a boolean which specifies whether it clears its selection on enter. Default true.
  -Make AddXformsWithXaos() be a static member of FractoriumEmberController for quicker build times.
+ -Remove the unused field m_RotCenterY from Ember.
+ -Make a #define for fma() testing, but seems to make no difference.
+ -Optimize some of the OpenCL iteration kernel generation code.
 
 1.0.0.18 1/31/2020
 --User changes
diff --git a/Source/EmberCL/IterOpenCLKernelCreator.cpp b/Source/EmberCL/IterOpenCLKernelCreator.cpp
index 5c238eb..c8def0d 100644
--- a/Source/EmberCL/IterOpenCLKernelCreator.cpp
+++ b/Source/EmberCL/IterOpenCLKernelCreator.cpp
@@ -1196,10 +1196,10 @@ string IterOpenCLKernelCreator<T>::CreateProjectionString(const Ember<T>& ember)
 				   "		z = fma(ember->m_C02, secondPoint.m_X, fma(ember->m_C12, secondPoint.m_Y, ember->m_C22 * z));\n"
 				   "\n"
 				   "		real_t zr = Zeps(1 - ember->m_CamPerspective * z);\n"
-				   "		real_t prcx = (x - carToRas->m_CarCenterX) / carToRas->m_CarHalfX;\n"
-				   "		real_t prcy = (y - carToRas->m_CarCenterY) / carToRas->m_CarHalfY;\n"
+				   "		real_t prcx = x / carToRas->m_CarHalfX;\n"
+				   "		real_t prcy = y / carToRas->m_CarHalfY;\n"
 				   "		real_t dist = sqrt(SQR(prcx) + SQR(prcy)) * (real_t)(10.0);\n"
-				   "		real_t scale = ember->m_BlurCurve != (real_t)(0.0) ? min((real_t)(1.0), (dist * dist) / (4 * ember->m_BlurCurve)) : (real_t)(1.0);\n"
+				   "		real_t scale = ember->m_BlurCurve != (real_t)(0.0) ? (SQR(dist) / (4 * ember->m_BlurCurve)) : (real_t)(1.0);\n"
 				   "		real_t dr = MwcNext01(&mwc) * (ember->m_BlurCoef * scale) * z;\n"
 				   "\n"
 				   "		dsin = sin(t);\n"
@@ -1224,10 +1224,10 @@ string IterOpenCLKernelCreator<T>::CreateProjectionString(const Ember<T>& ember)
 				   "		dsin = sin(t);\n"
 				   "		dcos = cos(t);\n"
 				   "\n"
-				   "		real_t prcx = (secondPoint.m_X - carToRas->m_CarCenterX) / carToRas->m_CarHalfX;\n"
-				   "		real_t prcy = (y - carToRas->m_CarCenterY) / carToRas->m_CarHalfY;\n"
+				   "		real_t prcx = secondPoint.m_X / carToRas->m_CarHalfX;\n"
+				   "		real_t prcy = y / carToRas->m_CarHalfY;\n"
 				   "		real_t dist = sqrt(SQR(prcx) + SQR(prcy)) * (real_t)(10.0);\n"
-				   "		real_t scale = ember->m_BlurCurve != (real_t)(0.0) ? min((real_t)(1.0), (dist * dist) / (4 * ember->m_BlurCurve)) : (real_t)(1.0);\n"
+				   "		real_t scale = ember->m_BlurCurve != (real_t)(0.0) ? (SQR(dist) / (4 * ember->m_BlurCurve)) : (real_t)(1.0);\n"
 				   "		real_t dr = MwcNext01(&mwc) * (ember->m_BlurCoef * scale) * z;\n"
 				   "\n"
 				   "		secondPoint.m_X = fma(dr, dcos, secondPoint.m_X) / zr;\n"