From 41527a1c3954a110b784a20a8115f46b6cdd98ba Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Tue, 3 Oct 2017 18:16:28 -0600
Subject: [PATCH] light: don't discard near-black lightmaps in q2

---
 light/ltface.cc | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/light/ltface.cc b/light/ltface.cc
index 7762f0c6..d0b58442 100644
--- a/light/ltface.cc
+++ b/light/ltface.cc
@@ -2597,9 +2597,11 @@ WriteLightmaps(const mbsp_t *bsp, bsp2_dface_t *face, facesup_t *facesup, const
             continue;
         
         // skip lightmaps where all samples have brightness below 1
-        const float maxb = Lightmap_MaxBrightness(&lightmap, lightsurf);
-        if (maxb < 1)
-            continue;
+        if (bsp->loadversion != Q2_BSPVERSION) { // HACK: don't do this on Q2. seems if all styles are 0xff, the face is drawn fullbright instead of black (Q1)
+            const float maxb = Lightmap_MaxBrightness(&lightmap, lightsurf);
+            if (maxb < 1)
+                continue;
+        }
         
         const float avgb = Lightmap_AvgBrightness(&lightmap, lightsurf);
         sortable.push_back({ avgb, &lightmap });