scripts/startup/bl_ui/properties_particle.py

@@ -1670,7 +1670,7 @@ class PARTICLE_PT_draw(ParticleButtonsPanel, Panel):
         if path:
             col.prop(part, "display_step", text="Strand Steps")
         col.prop(part, "display_percentage", slider=True, text="Amount")
-        if part.display_method != 'RENDER' or part.render_type == 'HALO':
+        if part.display_method != 'RENDER':
             col.prop(part, "display_size", text="Size")
 
         if part.display_percentage != 100 and psys is not None:

source/blender/blenkernel/BKE_blender_version.h

@@ -25,7 +25,7 @@ extern "C" {
 
 /* Blender file format version. */
 #define BLENDER_FILE_VERSION BLENDER_VERSION
-#define BLENDER_FILE_SUBVERSION 3
+#define BLENDER_FILE_SUBVERSION 4
 
 /* Minimum Blender version that supports reading file written with the current
  * version. Older Blender versions will test this and show a warning if the file

source/blender/blenkernel/intern/particle_system.c

@@ -4639,7 +4639,7 @@ void psys_changed_type(Object *ob, ParticleSystem *psys)
   }
 
   if (part->type == PART_HAIR) {
-    if (ELEM(part->ren_as, PART_DRAW_NOT, PART_DRAW_PATH, PART_DRAW_OB, PART_DRAW_GR) == 0) {
+    if (ELEM(part->ren_as, PART_DRAW_PATH, PART_DRAW_OB, PART_DRAW_GR) == 0) {
       part->ren_as = PART_DRAW_PATH;
     }
 
@@ -4661,6 +4661,11 @@ void psys_changed_type(Object *ob, ParticleSystem *psys)
 
     CLAMP(part->path_start, 0.0f, MAX2(100.0f, part->end + part->lifetime));
     CLAMP(part->path_end, 0.0f, MAX2(100.0f, part->end + part->lifetime));
+
+    if (ELEM(part->ren_as, part->draw_as, PART_DRAW_PATH)) {
+      part->ren_as = PART_DRAW_NOT;
+      part->draw_as = PART_DRAW_DOT;
+    }
   }
 
   psys_reset(psys, PSYS_RESET_ALL);

source/blender/blenloader/intern/versioning_400.cc

@@ -9,6 +9,7 @@
 #include "CLG_log.h"
 
 #include "DNA_movieclip_types.h"
+#include "DNA_particle_types.h"
 
 #include "BLI_assert.h"
 #include "BLI_listbase.h"
@@ -122,6 +123,18 @@ void blo_do_versions_400(FileData * /*fd*/, Library * /*lib*/, Main *bmain)
     }
   }
 
+  if (!MAIN_VERSION_ATLEAST(bmain, 400, 4)) {
+    LISTBASE_FOREACH (ParticleSettings *, part, &bmain->particles) {
+      /* Replace unsupported particle render types. */
+      if (ELEM(part->ren_as, PART_DRAW_HALO, PART_DRAW_LINE) ||
+          ((part->type == PART_EMITTER) && (part->ren_as == PART_DRAW_PATH)))
+      {
+        part->ren_as = PART_DRAW_NOT;
+        part->draw_as = PART_DRAW_DOT;
+      }
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *

source/blender/makesdna/DNA_particle_defaults.h

@@ -17,8 +17,8 @@
   { \
     .type = PART_EMITTER, \
     .distr = PART_DISTR_JIT, \
-    .draw_as = PART_DRAW_REND, \
-    .ren_as = PART_DRAW_HALO, \
+    .draw_as = PART_DRAW_DOT, \
+    .ren_as = PART_DRAW_NOT, \
     .bb_uv_split = 1, \
     .flag = PART_EDISTR | PART_TRAND | PART_HIDE_ADVANCED_HAIR, \
  \

source/blender/makesdna/DNA_particle_types.h

@@ -560,12 +560,12 @@ typedef enum eParticleShapeFlag {
 /* #ParticleSettings.ren_as */
 #define PART_DRAW_NOT 0
 #define PART_DRAW_DOT 1
-#define PART_DRAW_HALO 1
+#define PART_DRAW_HALO 1 /* deprecated */
 #define PART_DRAW_CIRC 2
 #define PART_DRAW_CROSS 3
 #define PART_DRAW_AXIS 4
-#define PART_DRAW_LINE 5
-#define PART_DRAW_PATH 6
+#define PART_DRAW_LINE 5 /* deprecated */
+#define PART_DRAW_PATH 6 /* only for hair */
 #define PART_DRAW_OB 7
 #define PART_DRAW_GR 8
 #define PART_DRAW_BB 9 /* deprecated */

source/blender/makesrna/intern/rna_particle.c

@@ -90,8 +90,6 @@ static const EnumPropertyItem part_hair_draw_as_items[] = {
 
 static const EnumPropertyItem part_ren_as_items[] = {
     {PART_DRAW_NOT, "NONE", 0, "None", ""},
-    {PART_DRAW_HALO, "HALO", 0, "Halo", ""},
-    {PART_DRAW_LINE, "LINE", 0, "Line", ""},
     {PART_DRAW_PATH, "PATH", 0, "Path", ""},
     {PART_DRAW_OB, "OBJECT", 0, "Object", ""},
     {PART_DRAW_GR, "COLLECTION", 0, "Collection", ""},
@@ -99,9 +97,8 @@ static const EnumPropertyItem part_ren_as_items[] = {
 };
 
 #ifdef RNA_RUNTIME
-static const EnumPropertyItem part_hair_ren_as_items[] = {
+static const EnumPropertyItem part_emitter_ren_as_items[] = {
     {PART_DRAW_NOT, "NONE", 0, "None", ""},
-    {PART_DRAW_PATH, "PATH", 0, "Path", ""},
     {PART_DRAW_OB, "OBJECT", 0, "Object", ""},
     {PART_DRAW_GR, "COLLECTION", 0, "Collection", ""},
     {0, NULL, 0, NULL, NULL},
@@ -1393,10 +1390,10 @@ static const EnumPropertyItem *rna_Particle_ren_as_itemf(bContext *UNUSED(C),
   ParticleSettings *part = (ParticleSettings *)ptr->owner_id;
 
   if (part->type == PART_HAIR) {
-    return part_hair_ren_as_items;
+    return part_ren_as_items;
   }
   else {
-    return part_ren_as_items;
+    return part_emitter_ren_as_items;
   }
 }