diff --git a/src/tangerine.cpp b/src/tangerine.cpp
index f799512..b8f294b 100644
--- a/src/tangerine.cpp
+++ b/src/tangerine.cpp
@@ -5,20 +5,21 @@
 #define UTIL_IMPLEMENTATION
 #include "util.h"
 
+using glm::vec4;
+
 
 // forward declarations
 
 bool initGraphics(SDLHandles* handles);
 
-LightsBuffer* initLights(MemoryArena* arena, GLContext* gl_ctx, u32 max_lights,
-						glm::vec4 ambient_color);
+LightsBuffer* initLights(RenderState* rs, u32 max_lights, vec4 ambient_color);
 
 
 // interface
 
 RenderState*
 initRenderState(GLClearColor clear_col,
-	glm::vec4 ambient_color,
+	vec4 ambient_color,
 	u32 max_models,
 	u32 max_textures,
 	u32 max_shaders,