From 1a748342218076fb8948c942f8f7e8610c6a6af3 Mon Sep 17 00:00:00 2001
From: Eric Wasylishen <ewasylishen@gmail.com>
Date: Fri, 16 Sep 2016 11:37:04 -0600
Subject: [PATCH] light: never receive dirtmapping on lit liquids

---
 light/ltface.cc | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/light/ltface.cc b/light/ltface.cc
index cc23d672..c1ace96b 100644
--- a/light/ltface.cc
+++ b/light/ltface.cc
@@ -702,6 +702,13 @@ CalcPoints(const modelinfo_t *modelinfo, const vec3_t offset, lightsurf_t *surf,
     }
 }
 
+static bool
+Face_IsLiquid(const bsp2_t *bsp, const bsp2_dface_t *face)
+{
+    const char *name = Face_TextureName(bsp, face);
+    return name[0] == '*';
+}
+
 static void
 Lightsurf_Init(const modelinfo_t *modelinfo, const bsp2_dface_t *face,
                const bsp2_t *bsp, lightsurf_t *lightsurf, facesup_t *facesup)
@@ -727,6 +734,11 @@ Lightsurf_Init(const modelinfo_t *modelinfo, const bsp2_dface_t *face,
         VectorSet(lightsurf->minlight_color, 255, 255, 255);
     }
     
+    /* never receive dirtmapping on lit liquids */
+    if (Face_IsLiquid(bsp, face)) {
+        lightsurf->nodirt = true;
+    }
+    
     /* Set up the plane, not including model offset */
     plane_t *plane = &lightsurf->plane;
     VectorCopy(bsp->dplanes[face->planenum].normal, plane->normal);