Improve Doom's bullet puff's visuals by only making it translucent when the sprite appears smoke-ey, and also always billboard it

wadsrc/static/zscript/actors/doom/doommisc.zs

@@ -62,8 +62,7 @@ class BulletPuff : Actor
 		+ALLOWPARTICLES
 		+RANDOMIZE
 		+ZDOOMTRANS
-		RenderStyle "Translucent";
-		Alpha 0.5;
+		+FORCEXYBILLBOARD
 		VSpeed 1;
 		Mass 5;
 	}
@@ -73,7 +72,7 @@ class BulletPuff : Actor
 		PUFF A 4 Bright;
 		PUFF B 4;
 	Melee:
-		PUFF CD 4;
+		PUFF CD 4 A_SetRenderStyle(0.7, STYLE_Translucent);
 		Stop;
 	}
 }