From e1f40ad99570b3d1a212e9894bc8050acc75714e Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Mon, 6 Feb 2023 21:56:51 -0700
Subject: [PATCH] light: LightGrid: don't calculate lighting for occluded
 samples

---
 light/light.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/light/light.cc b/light/light.cc
index b3762f4e..970d0f09 100644
--- a/light/light.cc
+++ b/light/light.cc
@@ -1082,8 +1082,11 @@ static void LightGrid(bspdata_t *bspdata)
                     for (int x = x_range.begin(); x < x_range.end(); ++x) {
                         qvec3d world_point = grid_mins + (qvec3d{x,y,z} * grid_dist);
 
-                        lightgrid_samples_t samples = CalcLightgridAtPoint(&bsp, world_point);
                         bool occluded = Light_PointInWorld(&bsp, world_point);
+                        lightgrid_samples_t samples;
+
+                        if (!occluded)
+                            samples = CalcLightgridAtPoint(&bsp, world_point);
 
                         int sample_index = (GRIDSIZE * GRIDSIZE * z) + (GRIDSIZE * y) + x;