Misc minor fixes

core/src/mindustry/graphics/Drawf.java

@@ -522,7 +522,7 @@ public class Drawf{
 
         if(a >= 1f/255f){
             if(lod > 0.0001f){
-                Draw.alpha(lod);
+                Draw.alpha(lod * a);
                 Draw.rect(start, x, y, start.width * scale * start.scl(), start.height * scale * start.scl(), rot + 180);
                 Draw.rect(end, x2, y2, end.width * scale * end.scl(), end.height * scale * end.scl(), rot);
                 Draw.alpha(a);

core/src/mindustry/graphics/ParticleRenderer.java

@@ -12,7 +12,7 @@ import java.util.concurrent.*;
 
 /** WIP experimental point-sprite based particle renderer. */
 public class ParticleRenderer{
-    static final boolean useAsync = true;
+    static final boolean useAsync = !OS.isIos && !OS.isAndroid;
     static final int maxParticles = 100_000, maxParticlesPerFrame = 25_000;
     static final int particleSize =
     1 + //time

core/src/mindustry/world/blocks/defense/turrets/ItemTurret.java

@@ -51,7 +51,7 @@ public class ItemTurret extends Turret{
 
         stats.remove(Stat.itemCapacity);
         stats.add(Stat.ammo, StatValues.ammo(ammoTypes, name));
-        stats.add(Stat.ammoCapacity, maxAmmo / ammoPerShot, StatUnit.shots);
+        stats.add(Stat.ammoCapacity, maxAmmo / Math.max(ammoPerShot, 1), StatUnit.shots);
     }
 
     @Override