From 8acb27a788f24f85f38cf4ca45f2c3124128fa26 Mon Sep 17 00:00:00 2001
From: Vito Caputo <vcaputo@pengaru.com>
Date: Tue, 8 Aug 2017 10:40:14 -0700
Subject: ray: add rudimentary gamma correction
color banding has been quite visible, and somewhat expected with a
direct conversion from the linear float color space to the 8-bit
integral rgb color components.
A simple lookup table is used here to non-linearly map the values, table
generation is taken from Greg Ward's REAL PIXELS gem in Graphics Gems II.
---
src/modules/ray/ray.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
(limited to 'src/modules')
diff --git a/src/modules/ray/ray.c b/src/modules/ray/ray.c
index 5a2dd40..c0c067e 100644
--- a/src/modules/ray/ray.c
+++ b/src/modules/ray/ray.c
@@ -112,7 +112,8 @@ static ray_scene_t scene = {
.objects = objects,
.lights = lights,
.ambient_color = { .x = 1.0f, .y = 1.0f, .z = 1.0f },
- .ambient_brightness = .04f,
+ .ambient_brightness = .1f,
+ .gamma = .55f,
};
static float r;
--
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