Improvements to Blenders color balance (lift/gamma/gain).

Fairly closely match some mac application colin has called 'Looks', to give better results.
- lift is now applied non linear (was being added to the color)
- change the color wheel to preserve the luminance of the gamma and gain values, this stops the color from being set too dark (option for the color wheel template).
- sub-pixel precission for the color wheel since the white area at the center can make a lot of difference with a very small change.

This change will make existing node and sequencer setups lift render slighly differently however discussed this with Ton and he's ok with it.

2 files changed, 3 insertions, 3 deletions

diff --git a/release/scripts/ui/properties_physics_common.py b/release/scripts/ui/properties_physics_common.py
index 5b4c07642b4..6d97e82ff41 100644
--- a/release/scripts/ui/properties_physics_common.py
+++ b/release/scripts/ui/properties_physics_common.py
@@ -38,7 +38,7 @@ def point_cache_ui(self, context, cache, enabled, cachetype):
     col.operator("ptcache.remove", icon='ZOOMOUT', text="")
 
     row = layout.row()
-    if cachetype in {'PSYS', 'HAIR', 'SMOKE'}:
+    if cachetype in ('PSYS', 'HAIR', 'SMOKE'):
         row.prop(cache, "external")
 
     if cache.external:
diff --git a/release/scripts/ui/space_sequencer.py b/release/scripts/ui/space_sequencer.py
index ed39a98e86a..03e692693d8 100644
--- a/release/scripts/ui/space_sequencer.py
+++ b/release/scripts/ui/space_sequencer.py
@@ -753,11 +753,11 @@ class SEQUENCER_PT_filter(SequencerButtonsPanel):
             col.row().prop(strip.color_balance, "lift")
             col.prop(strip.color_balance, "inverse_lift", text="Inverse")
             col = row.column()
-            col.template_color_wheel(strip.color_balance, "gamma", value_slider=False)
+            col.template_color_wheel(strip.color_balance, "gamma", value_slider=False, lock_luminosity=True)
             col.row().prop(strip.color_balance, "gamma")
             col.prop(strip.color_balance, "inverse_gamma", text="Inverse")
             col = row.column()
-            col.template_color_wheel(strip.color_balance, "gain", value_slider=False)
+            col.template_color_wheel(strip.color_balance, "gain", value_slider=False, lock_luminosity=True)
             col.row().prop(strip.color_balance, "gain")
             col.prop(strip.color_balance, "inverse_gain", text="Inverse")