Smoke now uses only one point cache where both normal and high resolution smoke are stored together:

* Separate caches were causing quite a lot of problems both in principle and practice.
* For example it doesn't really make sense to have different frame ranges for normal and high resolution smoke, but this was fully possible before.
* Also to fully bake the smoke you had to do a "Bake All Dynamics", which completely defeats the whole point of the feature!
* As a result of this change the smoke cache usage is much much simpler and less error prone.
* This is quite a big change, but hopefully there should be less rather than more problems as a result :)

Some other related changes:
* Changing the cache name now works for disk caches properly too, it now just renames the cache files so should be faster too!
* Smoke is now always forced to disk cache with step 1 on file load as there were some strange cases where smoke was trying to use memory cache.
* Disabled smoke debug prints from console.
* Disabled changing smoke parameters when smoke is baked.

Note to users: The unfortunate side effect of this is that old high resolution simulations have to be baked again, but in return you get much better and more logical functionality. Sorry none the less!

release/scripts/ui/properties_physics_smoke.py

@@ -69,6 +69,8 @@ class PHYSICS_PT_smoke(PhysicButtonsPanel, bpy.types.Panel):
 
                 split = layout.split()
 
+                split.enabled = not domain.point_cache.is_baked
+
                 col = split.column()
                 col.label(text="Resolution:")
                 col.prop(domain, "resolution_max", text="Divisions")
@@ -146,6 +148,44 @@ class PHYSICS_PT_smoke_groups(PhysicButtonsPanel, bpy.types.Panel):
         col.prop(group, "collision_group", text="")
 
 
+class PHYSICS_PT_smoke_highres(PhysicButtonsPanel, bpy.types.Panel):
+    bl_label = "Smoke High Resolution"
+    bl_options = {'DEFAULT_CLOSED'}
+
+    @classmethod
+    def poll(cls, context):
+        md = context.smoke
+        return md and (md.smoke_type == 'DOMAIN')
+
+    def draw_header(self, context):
+        md = context.smoke.domain_settings
+
+        self.layout.enabled = not md.point_cache.is_baked
+        self.layout.prop(md, "use_high_resolution", text="")
+
+    def draw(self, context):
+        layout = self.layout
+
+        md = context.smoke.domain_settings
+
+        layout.active = md.use_high_resolution
+
+        split = layout.split()
+        split.enabled = not md.point_cache.is_baked
+
+        col = split.column()
+        col.label(text="Resolution:")
+        col.prop(md, "amplify", text="Divisions")
+        col.prop(md, "smooth_emitter")
+
+        col = split.column()
+        col.label(text="Noise Method:")
+        col.row().prop(md, "noise_type", text="")
+        col.prop(md, "strength")
+
+        layout.prop(md, "show_high_resolution")
+
+
 class PHYSICS_PT_smoke_cache(PhysicButtonsPanel, bpy.types.Panel):
     bl_label = "Smoke Cache"
     bl_options = {'DEFAULT_CLOSED'}
@@ -159,7 +199,7 @@ class PHYSICS_PT_smoke_cache(PhysicButtonsPanel, bpy.types.Panel):
         layout = self.layout
 
         md = context.smoke.domain_settings
-        cache = md.point_cache_low
+        cache = md.point_cache
 
         layout.label(text="Compression:")
         layout.prop(md, "point_cache_compress_type", expand=True)
@@ -167,62 +207,6 @@ class PHYSICS_PT_smoke_cache(PhysicButtonsPanel, bpy.types.Panel):
         point_cache_ui(self, context, cache, (cache.is_baked is False), 'SMOKE')
 
 
-class PHYSICS_PT_smoke_highres(PhysicButtonsPanel, bpy.types.Panel):
-    bl_label = "Smoke High Resolution"
-    bl_options = {'DEFAULT_CLOSED'}
-
-    @classmethod
-    def poll(cls, context):
-        md = context.smoke
-        return md and (md.smoke_type == 'DOMAIN')
-
-    def draw_header(self, context):
-        md = context.smoke.domain_settings
-
-        self.layout.prop(md, "use_high_resolution", text="")
-
-    def draw(self, context):
-        layout = self.layout
-
-        md = context.smoke.domain_settings
-
-        layout.active = md.use_high_resolution
-
-        split = layout.split()
-
-        col = split.column()
-        col.label(text="Resolution:")
-        col.prop(md, "amplify", text="Divisions")
-        col.prop(md, "smooth_emitter")
-        col.prop(md, "show_high_resolution")
-
-        col = split.column()
-        col.label(text="Noise Method:")
-        col.row().prop(md, "noise_type", text="")
-        col.prop(md, "strength")
-
-
-class PHYSICS_PT_smoke_cache_highres(PhysicButtonsPanel, bpy.types.Panel):
-    bl_label = "Smoke High Resolution Cache"
-    bl_options = {'DEFAULT_CLOSED'}
-
-    @classmethod
-    def poll(cls, context):
-        md = context.smoke
-        return md and (md.smoke_type == 'DOMAIN') and md.domain_settings.use_high_resolution
-
-    def draw(self, context):
-        layout = self.layout
-
-        md = context.smoke.domain_settings
-        cache = md.point_cache_high
-
-        layout.label(text="Compression:")
-        layout.prop(md, "point_cache_compress_high_type", expand=True)
-
-        point_cache_ui(self, context, cache, (cache.is_baked is False), 'SMOKE')
-
-
 class PHYSICS_PT_smoke_field_weights(PhysicButtonsPanel, bpy.types.Panel):
     bl_label = "Smoke Field Weights"
     bl_options = {'DEFAULT_CLOSED'}