+extern vec3_t r_vieworigin;
+extern vec3_t r_viewforward;
+extern vec3_t r_viewleft;
+extern vec3_t r_viewright;
+extern vec3_t r_viewup;
+extern int r_view_x;
+extern int r_view_y;
+extern int r_view_z;
+extern int r_view_width;
+extern int r_view_height;
+extern int r_view_depth;
+extern float r_view_fov_x;
+extern float r_view_fov_y;
+extern matrix4x4_t r_view_matrix;
+
+extern mleaf_t *r_viewleaf, *r_oldviewleaf;
+extern unsigned short d_lightstylevalue[256]; // 8.8 fraction of base light value
+
+extern qboolean envmap;
+
+extern cvar_t r_drawentities;
+extern cvar_t r_drawviewmodel;
+extern cvar_t r_speeds;
+extern cvar_t r_fullbright;
+extern cvar_t r_wateralpha;
+extern cvar_t r_dynamic;
+extern cvar_t r_drawcollisionbrushes;
+
+void R_Init(void);
+void R_UpdateWorld(void); // needs no r_refdef
+void R_RenderView(void); // must call R_UpdateWorld and set r_refdef first
+
+
+void R_InitSky (qbyte *src, int bytesperpixel); // called at level load
+
+void R_WorldVisibility();
+void R_DrawParticles(void);
+void R_DrawExplosions(void);
+
+#define gl_solid_format 3
+#define gl_alpha_format 4
+
+int R_CullBox(const vec3_t mins, const vec3_t maxs);
+
+extern qboolean fogenabled;
+extern vec3_t fogcolor;
+extern vec_t fogdensity;
+#define calcfog(v) (exp(-(fogdensity*fogdensity*(((v)[0] - r_vieworigin[0])*((v)[0] - r_vieworigin[0])+((v)[1] - r_vieworigin[1])*((v)[1] - r_vieworigin[1])+((v)[2] - r_vieworigin[2])*((v)[2] - r_vieworigin[2])))))
+#define calcfogbyte(v) ((qbyte) (bound(0, ((int) ((float) (calcfog((v)) * 255.0f))), 255)))
+
+#include "r_modules.h"
+
+#include "meshqueue.h"
+
+#include "r_lerpanim.h"
+
+extern cvar_t r_render;
+extern cvar_t r_waterwarp;
+
+extern cvar_t r_textureunits;
+extern cvar_t gl_polyblend;
+extern cvar_t gl_dither;
+
+#include "gl_backend.h"
+
+#include "r_light.h"
+
+extern rtexture_t *r_texture_blanknormalmap;
+extern rtexture_t *r_texture_white;
+extern rtexture_t *r_texture_black;
+extern rtexture_t *r_texture_notexture;
+extern rtexture_t *r_texture_whitecube;
+extern rtexture_t *r_texture_normalizationcube;
+#define NUM_DETAILTEXTURES 1
+extern rtexture_t *r_texture_detailtextures[NUM_DETAILTEXTURES];
+extern rtexture_t *r_texture_distorttexture[64];
+
+void R_TimeReport(char *name);
+void R_TimeReport_Start(void);
+void R_TimeReport_End(void);
+
+// r_stain
+void R_Stain(const vec3_t origin, float radius, int cr1, int cg1, int cb1, int ca1, int cr2, int cg2, int cb2, int ca2);
+
+void R_DrawWorldCrosshair(void);
+void R_Draw2DCrosshair(void);
+
+void R_CalcBeam_Vertex3f(float *vert, const vec3_t org1, const vec3_t org2, float width);
+void R_DrawSprite(int blendfunc1, int blendfunc2, rtexture_t *texture, int depthdisable, const vec3_t origin, const vec3_t left, const vec3_t up, float scalex1, float scalex2, float scaley1, float scaley2, float cr, float cg, float cb, float ca);
+
+struct entity_render_s;
+struct texture_s;
+struct msurface_s;
+void R_UpdateTextureInfo(const entity_render_t *ent, texture_t *t);
+void R_UpdateAllTextureInfo(entity_render_t *ent);
+void R_QueueTextureSurfaceList(entity_render_t *ent, struct texture_s *texture, int texturenumsurfaces, const struct msurface_s **texturesurfacelist, const vec3_t modelorg);
+void R_DrawSurfaces(entity_render_t *ent, qboolean skysurfaces);