diff --git a/Cassiopee/CPlot/CPlot/Data.h b/Cassiopee/CPlot/CPlot/Data.h
index 42c6ce4dd..0516da7ff 100644
--- a/Cassiopee/CPlot/CPlot/Data.h
+++ b/Cassiopee/CPlot/CPlot/Data.h
@@ -615,6 +615,7 @@ void gmenuArrows(int key, int x, int y);
 
 // frustum
 void computeFrustumPlanes(ViewInfo& view);
+void computeFrustumPlanes2();
 int isInFrustum(Zone* z, ViewInfo& view);
 
 // files
diff --git a/Cassiopee/CPlot/CPlot/Display/display.cpp b/Cassiopee/CPlot/CPlot/Display/display.cpp
index 0e61cc9ee..e8e65adae 100644
--- a/Cassiopee/CPlot/CPlot/Display/display.cpp
+++ b/Cassiopee/CPlot/CPlot/Display/display.cpp
@@ -258,7 +258,7 @@ void Data::display()
             _view.xeye, _view.yeye, _view.zeye, 
             _view.dirx, _view.diry, _view.dirz);
   computeFrustumPlanes(_view);
-
+  
   glEnable(GL_MULTISAMPLE);
   
   // Display following mode
diff --git a/Cassiopee/CPlot/CPlot/Display/frustum.cpp b/Cassiopee/CPlot/CPlot/Display/frustum.cpp
index a6c447cc0..4850be7cc 100644
--- a/Cassiopee/CPlot/CPlot/Display/frustum.cpp
+++ b/Cassiopee/CPlot/CPlot/Display/frustum.cpp
@@ -18,13 +18,14 @@
 */
 #include "../ViewInfo.h"
 #include "../Zone.h"
+#include <GL/gl.h>
 #include <math.h>
 #include <stdio.h>
 
-#define TOL 1.e-6
+#define TOL 1.e-4
 
 //=============================================================================
-// Compute frustum planes
+// Compute frustum planes from view
 //=============================================================================
 void computeFrustumPlanes(ViewInfo& view)
 {
@@ -154,6 +155,90 @@ void computeFrustumPlanes(ViewInfo& view)
   view.RightNx = -Nx;
   view.RightNy = -Ny;
   view.RightNz = -Nz;
+
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.RightNx, view.RightNy, view.RightNz, view.RightD);
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.LeftNx, view.LeftNy, view.LeftNz, view.LeftD);
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.TopNx, view.TopNy, view.TopNz, view.TopD);
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.BottomNx, view.BottomNy, view.BottomNz, view.BottomD);
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.NearNx, view.NearNy, view.NearNz, view.NearD);
+  //printf("Nx=%g; Ny=%g; Nz=%g; di=%g\n", view.FarNx, view.FarNy, view.FarNz, view.FarD);
+}
+
+// Compute frustum planes from view matrices
+void computeFrustumPlanes2()
+{
+  // need further check
+  float proj[16]; float mod[16];
+  glGetFloatv(GL_PROJECTION_MATRIX, proj);
+  glGetFloatv(GL_MODELVIEW_MATRIX, mod);
+
+  float clip[16];
+  clip[0] = mod[0] * proj[0] + mod[1] * proj[4] + mod[2] * proj[8] + mod[3] * proj[12];
+  clip[1] = mod[0] * proj[1] + mod[1] * proj[5] + mod[2] * proj[9] + mod[3] * proj[13];
+  clip[2] = mod[0] * proj[2] + mod[1] * proj[6] + mod[2] * proj[10] + mod[3] * proj[14];
+  clip[3] = mod[0] * proj[3] + mod[1] * proj[7] + mod[2] * proj[11] + mod[3] * proj[15];
+
+  clip[4] = mod[4] * proj[0] + mod[5] * proj[4] + mod[6] * proj[8] + mod[7] * proj[12];
+  clip[5] = mod[4] * proj[1] + mod[5] * proj[5] + mod[6] * proj[9] + mod[7] * proj[13];
+  clip[6] = mod[4] * proj[2] + mod[5] * proj[6] + mod[6] * proj[10] + mod[7] * proj[14];
+  clip[7] = mod[4] * proj[3] + mod[5] * proj[7] + mod[6] * proj[11] + mod[7] * proj[15];
+
+  clip[8] = mod[8] * proj[0] + mod[9] * proj[4] + mod[10] * proj[8] + mod[11] * proj[12];
+  clip[9] = mod[8] * proj[1] + mod[9] * proj[5] + mod[10] * proj[9] + mod[11] * proj[13];
+  clip[10] = mod[8] * proj[2] + mod[9] * proj[6] + mod[10] * proj[10] + mod[11] * proj[14];
+  clip[11] = mod[8] * proj[3] + mod[9] * proj[7] + mod[10] * proj[11] + mod[11] * proj[15];
+
+  clip[12] = mod[12] * proj[0] + mod[13] * proj[4] + mod[14] * proj[8] + mod[15] * proj[12];
+  clip[13] = mod[12] * proj[1] + mod[13] * proj[5] + mod[14] * proj[9] + mod[15] * proj[13];
+  clip[14] = mod[12] * proj[2] + mod[13] * proj[6] + mod[14] * proj[10] + mod[15] * proj[14];
+  clip[15] = mod[12] * proj[3] + mod[13] * proj[7] + mod[14] * proj[11] + mod[15] * proj[15];
+
+  struct Plane { float a, b, c, d; };
+  Plane planes[6];
+
+  // Right plane
+  planes[0].a = clip[3] - clip[0];
+  planes[0].b = clip[7] - clip[4];
+  planes[0].c = clip[11] - clip[8];
+  planes[0].d = clip[15] - clip[12];
+
+  // Left plane
+  planes[1].a = clip[3] + clip[0];
+  planes[1].b = clip[7] + clip[4];
+  planes[1].c = clip[11] + clip[8];
+  planes[1].d = clip[15] + clip[12];
+
+  // Top plane
+  planes[2].a = clip[3] - clip[1];
+  planes[2].b = clip[7] - clip[5];
+  planes[2].c = clip[11] - clip[9];
+  planes[2].d = clip[15] - clip[13];
+
+  // Bottom plane
+  planes[3].a = clip[3] + clip[1];
+  planes[3].b = clip[7] + clip[5];
+  planes[3].c = clip[11] + clip[9];
+  planes[3].d = clip[15] + clip[13];
+
+  // near plane
+  planes[4].a = clip[3] - clip[2];
+  planes[4].b = clip[7] - clip[6];
+  planes[4].c = clip[11] - clip[10];
+  planes[4].d = clip[15] - clip[14];
+
+  // far plane
+  planes[5].a = clip[3] + clip[2];
+  planes[5].b = clip[7] + clip[6];
+  planes[5].c = clip[11] + clip[10];
+  planes[5].d = clip[15] + clip[14];
+
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[0].a, planes[0].b, planes[0].c, planes[0].d);
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[1].a, planes[1].b, planes[1].c, planes[1].d);
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[2].a, planes[2].b, planes[2].c, planes[2].d);
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[3].a, planes[3].b, planes[3].c, planes[3].d);
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[4].a, planes[4].b, planes[4].c, planes[2].d);
+  //printf("a=%g; b=%g; c=%g; d=%g\n", planes[5].a, planes[5].b, planes[5].c, planes[3].d);
+  return;
 }
 
 //=============================================================================
@@ -164,7 +249,7 @@ E_Int isInFrustum(Zone* z, ViewInfo& view)
 {
 #ifdef __MESA__
   // to avoid abusive clipping in osmesa
-  return 1;
+  //return 1;
 #endif
 
   E_Int out;
@@ -223,7 +308,7 @@ E_Int isInFrustum(Zone* z, ViewInfo& view)
   }
   if (out == 8) return 0;
   
-  // all points roght of righ plane
+  // all points right of right plane
   out = 0;
   for (E_Int k = 0; k < 8; k++)
   {
@@ -232,7 +317,7 @@ E_Int isInFrustum(Zone* z, ViewInfo& view)
   }
   if (out == 8) return 0;
   
-  // all points top of top plane
+  // all points above top plane
   out = 0;
   for (E_Int k = 0; k < 8; k++)
   {
@@ -241,7 +326,7 @@ E_Int isInFrustum(Zone* z, ViewInfo& view)
   }
   if (out == 8) return 0;
   
-  // all points bottom of bottom plane
+  // all points below bottom plane
   out = 0;
   for (E_Int k = 0; k < 8; k++)
   {
diff --git a/Cassiopee/CPlot/CPlot/Plugins/screenDump.cpp b/Cassiopee/CPlot/CPlot/Plugins/screenDump.cpp
index 37efa77a0..6fc11215f 100644
--- a/Cassiopee/CPlot/CPlot/Plugins/screenDump.cpp
+++ b/Cassiopee/CPlot/CPlot/Plugins/screenDump.cpp
@@ -75,7 +75,7 @@ char* Data::export2Image(E_Int exportWidth, E_Int exportHeight)
   // resolution
   GLuint fb, rb, db;
 #ifdef __SHADERS__
-  if (ptrState->offscreen == 2 || ptrState->offscreen == 3 || ptrState->offscreen == 4) // openGL offscreen rendering
+  if (ptrState->offscreen == 0 || ptrState->offscreen == 2 || ptrState->offscreen == 3 || ptrState->offscreen == 4) // openGL offscreen rendering
   { 
     glGenFramebuffersEXT(1, &fb);
     glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fb);
@@ -108,14 +108,14 @@ char* Data::export2Image(E_Int exportWidth, E_Int exportHeight)
   //  // Attach depth buffer to FBO
   //  glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER_EXT, db);
   //}
-  else if (ptrState->offscreen == 2) // opengl offscreen
+  else if (ptrState->offscreen == 0 || ptrState->offscreen == 2) // opengl offscreen
   {
     glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, exportWidth, exportHeight);
     // Attach depth buffer to FBO
     glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_RENDERBUFFER_EXT, db);
   }
 
-  if (ptrState->offscreen == 2 || ptrState->offscreen == 3 || ptrState->offscreen == 4) // opengl offscreen
+  if (ptrState->offscreen == 0 || ptrState->offscreen == 2 || ptrState->offscreen == 3 || ptrState->offscreen == 4) // opengl offscreen
   { 
     int status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
     if (status == GL_FRAMEBUFFER_COMPLETE_EXT)
diff --git a/Cassiopee/CPlot/CPlot/display1.h b/Cassiopee/CPlot/CPlot/display1.h
index c84706c4e..1d2c821ab 100644
--- a/Cassiopee/CPlot/CPlot/display1.h
+++ b/Cassiopee/CPlot/CPlot/display1.h
@@ -19,7 +19,7 @@
   int bgColor, shadow, dof, offscreen, stereo, frameBuffer, panorama;
   E_Float lightOffsetX, lightOffsetY;
   E_Float dofPower, gamma; int toneMapping;
-  PyObject* posCamList; PyObject* posEyeList; PyObject* dirCamList; PyObject* exportList; // only for ODS
+  PyObject* posCamList; PyObject* posEyeList; PyObject* dirCamList; // only for ODS
   if (!PyArg_ParseTuple(args, "OiOOOOOiiiiiiiddiiiiisssOidO(ii)(ddd)(ddd)(ddd)disi(dd)iddiidissOOiiOOO",
                         &arrays, &dim, &modeObject, &scalarFieldObject,
                         &vectorFieldObject1, &vectorFieldObject2, &vectorFieldObject3,
diff --git a/Cassiopee/CPlot/CPlot/panorama.cpp b/Cassiopee/CPlot/CPlot/panorama.cpp
index 72066c37d..bb6870f57 100644
--- a/Cassiopee/CPlot/CPlot/panorama.cpp
+++ b/Cassiopee/CPlot/CPlot/panorama.cpp
@@ -453,7 +453,7 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
 
   char* varString;
   E_Int ni, nj, nk, res;
-  FldArrayF* array; FldArrayI* cn; char* eltType;
+  FldArrayI* cn; char* eltType;
   std::vector<FldArrayF*> frontImages(nangles);
   for (E_Int i = 0; i < nangles; i++)
   {
@@ -541,7 +541,6 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
     imb4[i] = botImages[i]->begin(7);
   }
 
-
   // final image pointers
   E_Float* final1 = final->begin(4); // r,g,b,a
   E_Float* final2 = final->begin(5);
@@ -553,16 +552,9 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
   if (type360 == 0) { tinf = -M_PI; tsup = 2*M_PI; } // 360
   else  { tinf = -M_PI/2.; tsup = M_PI; } // 180
 
-  // fov of each cube image
-  E_Float fov = 90.;
-
-  E_Int nijl = nil*njl; // final image
-  E_Int nil1 = nil-1;
-  E_Int njl1 = njl-1;
   E_Int ni1 = ni-1; // cube image
   E_Int nj1 = nj-1;
-  //printf("ni=%d, nj=%d\n", ni, nj);
-
+  
   E_Int ind;
   
   // direct sliting
@@ -583,8 +575,7 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
   //return Py_None;
 
   // transformation
-  E_Float theta = 0.;
-  E_Float x, y, z, scale, py, phi, ty;
+  E_Float y, z, scale, py, phi, ty;
 
   for (E_Int i = 0; i < nangles; i++)
   {
@@ -596,7 +587,6 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
   
       ind = i + j*nil;
       
-      x = 0.;
       y = sin(phi); // entre -1 et 1
       z = cos(phi); // entre 0 et 0
 
@@ -646,15 +636,12 @@ PyObject* K_CPLOT::panoramaODS(PyObject* self, PyObject* args)
 void accumulateSlit(E_Int ni, E_Int nj, char* imf, char* imt, char* imb, 
                     E_Int i, E_Int nil, E_Int njl, char* imOut)
 {
-  E_Int nijl = nil*njl; // final image
-  E_Int nil1 = nil-1;
-  E_Int njl1 = njl-1;
   E_Int ni1 = ni-1; // slit image
   E_Int nj1 = nj-1;
   
   {
     E_Int ind;
-    E_Float scale, ty, py, phi, x, y, z;
+    E_Float scale, ty, py, phi, y, z;
 
     // 1D interpolation
     for (E_Int j = 0; j < njl; j++)
@@ -663,7 +650,6 @@ void accumulateSlit(E_Int ni, E_Int nj, char* imf, char* imt, char* imb,
       phi = M_PI/2. - ty * M_PI; // between pi/2 and -pi/2
       ind = i + (njl-j-1)*nil;
 
-      x = 0.;
       y = sin(phi); // entre -1 et 1
       z = cos(phi); // entre 0 et 0