diff --git a/raycaster.cpp b/raycaster.cpp
index 77984907..b379decd 100644
--- a/raycaster.cpp
+++ b/raycaster.cpp
@@ -77,7 +77,8 @@ bool need_many_cell_types() {
 /** is the raycaster available? */
 EX bool available() {
   #if CAP_VR
-  if(vrhr::state) return false; /* not implemented */
+  /* would need a completely different implementation */
+  if(vrhr::state && vrhr::eyes == vrhr::eEyes::equidistant) return false;
   #endif
   if(noGUI) return false;
   if(!vid.usingGL) return false;
@@ -1338,11 +1339,16 @@ EX void cast() {
   cd->set_viewport(global_projection);
   cd->set_mask(global_projection);
   
-  transmatrix proj = Id;
-  proj = eupush(-global_projection * d, 0) * proj;
-  proj = euscale(cd->tanfov / (vid.stereo_mode == sLR ? 2 : 1), cd->tanfov * cd->ysize / cd->xsize) * proj;
-  proj = eupush(-((cd->xcenter-cd->xtop)*2./cd->xsize - 1), -((cd->ycenter-cd->ytop)*2./cd->ysize - 1)) * proj;
-  glUniformMatrix4fv(o->uProjection, 1, 0, glhr::tmtogl_transpose3(proj).as_array());
+  if(vrhr::state == 2) {
+    glUniformMatrix4fv(o->uProjection, 1, 0, glhr::tmtogl_transpose3(vrhr::eyeproj).as_array());
+    }
+  else {
+    transmatrix proj = Id;
+    proj = eupush(-global_projection * d, 0) * proj;
+    proj = euscale(cd->tanfov / (vid.stereo_mode == sLR ? 2 : 1), cd->tanfov * cd->ysize / cd->xsize) * proj;
+    proj = eupush(-((cd->xcenter-cd->xtop)*2./cd->xsize - 1), -((cd->ycenter-cd->ytop)*2./cd->ysize - 1)) * proj;
+    glUniformMatrix4fv(o->uProjection, 1, 0, glhr::tmtogl_transpose3(proj).as_array());
+    }
   
   if(!callhandlers(false, hooks_rayset, o)) {
   
diff --git a/vr.cpp b/vr.cpp
index 0c4bb321..72fd9e81 100644
--- a/vr.cpp
+++ b/vr.cpp
@@ -100,6 +100,8 @@ vr_framebuffer::vr_framebuffer(int xsize, int ysize) {
   rb.reset();
   }
 
+EX transmatrix eyeproj;
+
 vr_framebuffer::~vr_framebuffer() {
   glDeleteRenderbuffers( 1, &m_nDepthBufferId );
   glDeleteTextures( 1, &m_nRenderTextureId );
@@ -117,6 +119,7 @@ struct vrdata_t {
   uint32_t xsize, ysize;
   vr_framebuffer *eyes[2];
   transmatrix proj[2];
+  transmatrix iproj[2]; /* inverse of proj */
   transmatrix eyepos[2];
   vr::TrackedDevicePose_t poses[ vr::k_unMaxTrackedDeviceCount ];
   transmatrix pose_matrix[vr::k_unMaxTrackedDeviceCount ];
@@ -588,6 +591,8 @@ EX void start_vr() {
     vrdata.proj[a] = 
       vr_to_hr(vrdata.vr->GetProjectionMatrix(eye, 0.01, 300));
     
+    vrdata.iproj[a] = MirrorZ * inverse(vrdata.proj[a]);
+    
     println(hlog, "projection = ", vrdata.proj[a]);
     
     vrdata.eyepos[a] =
@@ -788,9 +793,10 @@ EX void render() {
           }
         hmd_mvp = vrdata.proj[i] * hmd_mvp;
         }
+      eyeproj = vrdata.iproj[i];
+      drawqueue();
       }
     
-    drawqueue();
     }
 
   rb.reset();