From 013fea965b2b59f188de55d54c72ae5ac71de51b Mon Sep 17 00:00:00 2001
From: Bill Currie <bill@taniwha.org>
Date: Thu, 25 Jan 2024 15:15:50 +0900
Subject: [PATCH] [vulkan] Actually blend lightmaps

An errant + resulted in an attempt to blend lightmaps resulting in using
only the final lightmap.
---
 libs/video/renderer/vulkan/vulkan_lightmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/video/renderer/vulkan/vulkan_lightmap.c b/libs/video/renderer/vulkan/vulkan_lightmap.c
index 626accb5a..097989770 100644
--- a/libs/video/renderer/vulkan/vulkan_lightmap.c
+++ b/libs/video/renderer/vulkan/vulkan_lightmap.c
@@ -160,7 +160,7 @@ vulkan_build_lightmap (const mod_brush_t *brush, msurface_t *surf,
 				vec4f_t val = { VectorExpand (lightmap), 0 };
 				val *= scale;
 				lightmap += 3;
-				*bl++ = val;
+				*bl++ += val;
 			}
 		}
 	}