I've got server code spawning a bunch of particles in front of the player, but I see nothing.  What am I missing?

 

Here's the code (caster is an EntityPlayer):

			World world = caster.world;
			Vec3d pos = ModUtils.PointAhead(caster, 1.5F);
			Vec3d lookDir = caster.getLookVec();
			for (int i = 0; i < 32; i++) {
				Vec3d v = new Vec3d(lookDir.x + MathHelper.nextDouble(random, -0.5, 0.5),
						lookDir.y + MathHelper.nextDouble(random, -0.5, 0.5),
						lookDir.z + MathHelper.nextDouble(random, -0.5, 0.5));
				v = v.scale(2);
				world.spawnAlwaysVisibleParticle(EnumParticleTypes.SPELL_MOB.getParticleID(), 
						pos.x, pos.y, pos.z, 
						v.x, v.y, v.z, // velocity
						// (optional particle arguments go here... maybe color?)
						255, 0, 0);
				System.out.println("Spawned particle at " + pos + " with velocity " + v);
			}
		}

 

 

And this causes messages like the following to appear in the log:

[08:49:09] [Server thread/INFO] [STDOUT]: [net.strout.wizarding.SpellEffects$Sparks:DoEffect:131]: Spawned particle at (-621.3208915739522, 64.58865155559033, 346.8873318756315) with velocity (1.2252315947908472, -0.24176556778545355, -0.10210638379011927)
[08:49:09] [Server thread/INFO] [STDOUT]: [net.strout.wizarding.SpellEffects$Sparks:DoEffect:131]: Spawned particle at (-621.3208915739522, 64.58865155559033, 346.8873318756315) with velocity (1.2878165420981733, 0.6032242196690139, 0.04981358307420081)
[08:49:09] [Server thread/INFO] [STDOUT]: [net.strout.wizarding.SpellEffects$Sparks:DoEffect:131]: Spawned particle at (-621.3208915739522, 64.58865155559033, 346.8873318756315) with velocity (1.6579566964412826, -0.5821367025405804, 0.6348263056580719)

 

I have studied these coordinates compared to my position and rotation, and they are correct (1.5 blocks in front of my eyes).  I've used very similar code on the client, and then I do see particles appear.  But of course this should be done on the server, so that all players can see them (right?).

 

While I'm using spawnAlwaysVisibleParticle in the code above, I've also tried other variations (spawnParticle) with the same result.  And I don't think it's an issue with my graphics settings, since particles spawned on the client do appear.

 

So... what am I doing wrong?

Wow, I guess I had that all wrong.  But it explains a lot.

 

But if they're spawned client-side... doesn't that mean that other players do not see them?

 

Supposing I do want the particles to be seen by all clients, I guess that means I either get the non-overriding WorldServer versions, or send my own packets to all nearby clients to spawn their own particles?