Draw lava, slime and teleporters as liquids, but not transparent.

draw.h

@@ -256,7 +256,7 @@ static INLINE void draw_quadstrip_textured(const ps1bsp_vertex_t *vertices, cons
     }
 }
 
-static INLINE void draw_quadstrip_water(const ps1bsp_vertex_t *vertices, const ps1bsp_polyvertex_t *polyVerts, u_char numVerts, u_short tpage, u_long *ot)
+static INLINE void draw_quadstrip_water(const ps1bsp_vertex_t *vertices, const ps1bsp_polyvertex_t *polyVerts, u_char numVerts, u_short tpage, u_char semiTrans, u_long *ot)
 {
     // Draw the face as a quad strip
     const ps1bsp_polyvertex_t *v0, *v1, *v2, *v3;
@@ -289,7 +289,7 @@ static INLINE void draw_quadstrip_water(const ps1bsp_vertex_t *vertices, const p
         // Draw a flat-shaded textured quad
         POLY_FT4 *poly = (POLY_FT4*)mem_prim(sizeof(POLY_FT4));
         setPolyFT4(poly);
-        setSemiTrans(poly, 1);
+        setSemiTrans(poly, semiTrans);
         gte_stsxy3_ft3(poly);
 
         // Transform the fourth vertex to complete the quad

ps1bsp.h

@@ -85,7 +85,7 @@ typedef struct
 } ps1bsp_facevertex_t;
 
 #define SURF_DRAWSKY		0x2
-#define SURF_DRAWTURB		0x4
+#define SURF_DRAWLIQUID		0x4
 #define SURF_DRAWWATER		0x8
 
 // High quality: Face -> polygons -> polygon vertex indices (index + UV + light) -> vertices

world.c

@@ -142,12 +142,12 @@ static void world_drawface_textured(const world_t *world, const ps1bsp_face_t *f
     const ps1bsp_texture_t *texture = &world->textures[face->textureId];
     const ps1bsp_polygon_t* poly = &world->polygons[face->firstPolygon];
 
-    if (face->flags & SURF_DRAWWATER)
+    if (face->flags & SURF_DRAWLIQUID)
     {
         for (u_char polyIdx = 0; polyIdx < face->numPolygons; ++polyIdx, ++poly)
         {
             ps1bsp_polyvertex_t *polyVertices = &world->polyVertices[poly->firstPolyVertex];
-            draw_quadstrip_water(world->vertices, polyVertices, poly->numPolyVertices, texture->tpage, ot);
+            draw_quadstrip_water(world->vertices, polyVertices, poly->numPolyVertices, texture->tpage, face->flags & SURF_DRAWWATER, ot);
         }
     }
     else