Index: trunk/psphot/src/psphotStackImageLoop.c
===================================================================
--- trunk/psphot/src/psphotStackImageLoop.c	(revision 34258)
+++ trunk/psphot/src/psphotStackImageLoop.c	(revision 34317)
@@ -21,4 +21,5 @@
     psMemDump("startloop");
 
+    pmFPAview *view = pmFPAviewAlloc (0);
     pmFPAfile *inputRaw = psMetadataLookupPtr (&status, config->files, "PSPHOT.STACK.INPUT.RAW");
     pmFPAfile *inputCnv = psMetadataLookupPtr (&status, config->files, "PSPHOT.STACK.INPUT.CNV");
@@ -37,8 +38,12 @@
     }
 
-    pmFPAview *view = pmFPAviewAlloc (0);
-
-
-    // XXX for now, just load the full set of images up front except for EXPNUM which we defer
+    bool radial_apertures = psMetadataLookupBool(NULL, recipe, "RADIAL_APERTURES");
+    bool match_psfs = radial_apertures;
+    bool needConvolved = radial_apertures || !useRaw;
+    if (!needConvolved) {
+        pmFPAfileActivate (config->files, false, "PSPHOT.STACK.INPUT.CNV");
+    }
+
+    // just load the full set of images up front except for EXPNUM which we defer
     pmFPAfileActivate (config->files, false, "PSPHOT.STACK.EXPNUM.RAW");
     pmFPAfileActivate (config->files, false, "PSPHOT.STACK.EXPNUM.CNV");
@@ -63,10 +68,18 @@
 		psMemDump("load");
 
-		// Generate the 1st PSF-matched image set (larger target PSFs are generated by smoothing this image)
-		if (!psphotStackMatchPSFs (config, view)) {
-                    psError(psErrorCodeLast(), false, "failure in psphotStackMatchPSFs for chip %d, cell %d, readout %d\n", view->chip, view->cell, view->readout);
-                    psFree (view);
-                    return false;
-		}
+                if (match_psfs) {
+                    // Generate the 1st PSF-matched image set (larger target PSFs are generated by smoothing this image)
+                    if (!psphotStackMatchPSFs (config, view)) {
+                        psError(psErrorCodeLast(), false, "failure in psphotStackMatchPSFs for chip %d, cell %d, readout %d\n", view->chip, view->cell, view->readout);
+                        psFree (view);
+                        return false;
+                    }
+                } else {
+                    if (!psphotStackAllocateOutput (config, view, recipe)) {
+                        psError(psErrorCodeLast(), false, "failure in psphotStackAllocateOutput for chip %d, cell %d, readout %d\n", view->chip, view->cell, view->readout);
+                        psFree (view);
+                        return false;
+                    }
+                }
 		psMemDump("stackmatch");