From 9304a0041d6fd4fd229e270d8f3002d56584bb4b Mon Sep 17 00:00:00 2001
From: Alibek Omarov <a1ba.omarov@gmail.com>
Date: Sat, 6 Jan 2024 19:21:11 +0300
Subject: [PATCH] ref: gl: support kRenderFxLightMultiplier

* add undocumented kRenderFxLightMultiplier to const.h
---
 common/const.h     | 1 +
 ref/gl/gl_studio.c | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/common/const.h b/common/const.h
index a7e3d08b..fe4469fa 100644
--- a/common/const.h
+++ b/common/const.h
@@ -717,6 +717,7 @@ enum
 	kRenderFxExplode,			// Scale up really big!
 	kRenderFxGlowShell,			// Glowing Shell
 	kRenderFxClampMinScale,		// Keep this sprite from getting very small (SPRITES only!)
+	kRenderFxLightMultiplier,
 };
 
 typedef int		func_t;
diff --git a/ref/gl/gl_studio.c b/ref/gl/gl_studio.c
index 8932ae51..2b3de57b 100644
--- a/ref/gl/gl_studio.c
+++ b/ref/gl/gl_studio.c
@@ -1435,6 +1435,13 @@ void R_StudioDynamicLight( cl_entity_t *ent, alight_t *plight )
 		}
 	}
 
+	if( ent->curstate.renderfx == kRenderFxLightMultiplier && ent->curstate.iuser4 != 10 )
+	{
+		light.r *= ent->curstate.iuser4 / 10.0f;
+		light.g *= ent->curstate.iuser4 / 10.0f;
+		light.b *= ent->curstate.iuser4 / 10.0f;
+	}
+
 	VectorSet( finalLight, light.r, light.g, light.b );
 	ent->cvFloorColor = light;