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-rw-r--r--builtin/settingtypes.txt39
1 files changed, 24 insertions, 15 deletions
diff --git a/builtin/settingtypes.txt b/builtin/settingtypes.txt
index fa6591c2f..feb29c2e2 100644
--- a/builtin/settingtypes.txt
+++ b/builtin/settingtypes.txt
@@ -639,25 +639,34 @@ vsync (VSync) bool false
# Field of view in degrees.
fov (Field of view) int 72 45 160
-# Adjust the gamma encoding for the light tables. Higher numbers are brighter.
-# This setting is for the client only and is ignored by the server.
-display_gamma (Gamma) float 1.0 0.5 10.0
+# Alters the light curve by applying 'gamma correction' to it.
+# Higher values make middle and lower light levels brighter.
+# Value '1.0' leaves the light curve unaltered.
+# This only has significant effect on daylight and artificial
+# light, it has very little effect on natural night light.
+display_gamma (Light curve gamma) float 1.0 0.33 3.0
# Gradient of light curve at minimum light level.
-lighting_alpha (Darkness sharpness) float 0.0 0.0 4.0
+# Controls the contrast of the lowest light levels.
+lighting_alpha (Light curve low gradient) float 0.0 0.0 3.0
# Gradient of light curve at maximum light level.
-lighting_beta (Lightness sharpness) float 1.5 0.0 4.0
-
-# Strength of light curve mid-boost.
-lighting_boost (Light curve mid boost) float 0.2 0.0 1.0
-
-# Center of light curve mid-boost.
-lighting_boost_center (Light curve mid boost center) float 0.5 0.0 1.0
-
-# Spread of light curve mid-boost.
-# Standard deviation of the mid-boost Gaussian.
-lighting_boost_spread (Light curve mid boost spread) float 0.2 0.0 1.0
+# Controls the contrast of the highest light levels.
+lighting_beta (Light curve high gradient) float 1.5 0.0 3.0
+
+# Strength of light curve boost.
+# The 3 'boost' parameters define a range of the light
+# curve that is boosted in brightness.
+lighting_boost (Light curve boost) float 0.2 0.0 0.4
+
+# Center of light curve boost range.
+# Where 0.0 is minimum light level, 1.0 is maximum light level.
+lighting_boost_center (Light curve boost center) float 0.5 0.0 1.0
+
+# Spread of light curve boost range.
+# Controls the width of the range to be boosted.
+# Standard deviation of the light curve boost Gaussian.
+lighting_boost_spread (Light curve boost spread) float 0.2 0.0 0.4
# Path to texture directory. All textures are first searched from here.
texture_path (Texture path) path