The arc kind works might as well keep it around.

client/ClientHelper.java

@@ -21,6 +21,7 @@ import net.minecraft.init.Items;
 import net.minecraft.item.ItemBlock;
 import net.minecraft.item.ItemStack;
 import net.minecraft.util.MovingObjectPosition;
+import net.minecraft.util.Vec3;
 import net.minecraft.world.World;
 import net.minecraftforge.client.ForgeHooksClient;
 import net.minecraftforge.client.IItemRenderer;
@@ -38,6 +39,7 @@ import appeng.client.render.WorldRender;
 import appeng.client.render.effects.AssemblerFX;
 import appeng.client.render.effects.CraftingFx;
 import appeng.client.render.effects.EnergyFx;
+import appeng.client.render.effects.LightningArcFX;
 import appeng.client.render.effects.LightningFX;
 import appeng.client.render.effects.VibrantFX;
 import appeng.client.texture.CableBusTextures;
@@ -255,6 +257,9 @@ public class ClientHelper extends ServerHelper
 			case Lightning:
 				spawnLightning( worldObj, posX, posY, posZ );
 				return;
+			case LightningArc:
+				spawnLightningArc( worldObj, posX, posY, posZ, (Vec3) o );
+				return;
 			}
 		}
 	}
@@ -280,6 +285,12 @@ public class ClientHelper extends ServerHelper
 		}
 	}
 
+	private void spawnLightningArc(World worldObj, double posX, double posY, double posZ, Vec3 second)
+	{
+		LightningFX fx = new LightningArcFX( worldObj, posX, posY, posZ, second.xCoord, second.yCoord, second.zCoord, 0.0f, 0.0f, 0.0f );
+		Minecraft.getMinecraft().effectRenderer.addEffect( (EntityFX) fx );
+	}
+
 	private void spawnLightning(World worldObj, double posX, double posY, double posZ)
 	{
 		LightningFX fx = new LightningFX( worldObj, posX, posY + 0.3f, posZ, 0.0f, 0.0f, 0.0f );

client/EffectType.java

@@ -2,5 +2,5 @@ package appeng.client;
 
 public enum EffectType
 {
-	Energy, Lightning, Vibrant, Crafting, Assembler
+	Energy, Lightning, Vibrant, Crafting, Assembler, LightningArc
 }

client/render/effects/LightningArcFX.java

@@ -0,0 +1,38 @@
+package appeng.client.render.effects;
+
+import net.minecraft.world.World;
+
+public class LightningArcFX extends LightningFX
+{
+
+	double rx, ry, rz;
+
+	public LightningArcFX(World w, double x, double y, double z, double ex, double ey, double ez, double r, double g, double b) {
+		super( w, x, y, z, r, g, b, 6 );
+
+		this.rx = ex - x;
+		this.ry = ey - y;
+		this.rz = ez - z;
+
+		regen();
+	}
+
+	@Override
+	protected void regen()
+	{
+		double i = 1.0 / (steps - 1);
+		double lastDirectionX = rx * i;
+		double lastDirectionY = ry * i;
+		double lastDirectionZ = rz * i;
+
+		double len = Math.sqrt( lastDirectionX * lastDirectionX + lastDirectionY * lastDirectionY + lastDirectionZ * lastDirectionZ );
+		for (int s = 0; s < steps; s++)
+		{
+			Steps[s][0] = (lastDirectionX + (rng.nextDouble() - 0.5) * len * 1.2) / 2.0;
+			Steps[s][1] = (lastDirectionY + (rng.nextDouble() - 0.5) * len * 1.2) / 2.0;
+			Steps[s][2] = (lastDirectionZ + (rng.nextDouble() - 0.5) * len * 1.2) / 2.0;
+		}
+
+	}
+
+}

client/render/effects/LightningFX.java

@@ -14,28 +14,27 @@ import org.lwjgl.opengl.GL11;
 public class LightningFX extends EntityFX
 {
 
-	final int steps = 5;
+	final int steps = getSteps();
 	static Random rng = new Random();
 	double[][] Steps;
 
-	public LightningFX(World w, double x, double y, double z, double r, double g, double b) {
+	protected LightningFX(World w, double x, double y, double z, double r, double g, double b, int maxAge) {
 		super( w, x, y, z, r, g, b );
 		Steps = new double[steps][3];
 		motionX = 0;
 		motionY = 0;
 		motionZ = 0;
-		particleMaxAge = 6;
+		particleMaxAge = maxAge;
+	}
 
-		// particleMaxAge = 269;
+	private int getSteps()
-		double lastDirectionX = (rng.nextDouble() - 0.5) * 0.9;
+	{
-		double lastDirectionY = (rng.nextDouble() - 0.5) * 0.9;
+		return 5;
-		double lastDirectionZ = (rng.nextDouble() - 0.5) * 0.9;
+	}
-		for (int s = 0; s < steps; s++)
+
-		{
+	public LightningFX(World w, double x, double y, double z, double r, double g, double b) {
-			Steps[s][0] = lastDirectionX = (lastDirectionX + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
+		this( w, x, y, z, r, g, b, 6 );
-			Steps[s][1] = lastDirectionY = (lastDirectionY + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
+		regen();
-			Steps[s][2] = lastDirectionZ = (lastDirectionZ + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
-		}
 	}
 
 	float currentPoint = 0;
@@ -47,6 +46,19 @@ public class LightningFX extends EntityFX
 		return j1 << 20 | j1 << 4;
 	}
 
+	protected void regen()
+	{
+		double lastDirectionX = (rng.nextDouble() - 0.5) * 0.9;
+		double lastDirectionY = (rng.nextDouble() - 0.5) * 0.9;
+		double lastDirectionZ = (rng.nextDouble() - 0.5) * 0.9;
+		for (int s = 0; s < steps; s++)
+		{
+			Steps[s][0] = lastDirectionX = (lastDirectionX + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
+			Steps[s][1] = lastDirectionY = (lastDirectionY + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
+			Steps[s][2] = lastDirectionZ = (lastDirectionZ + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
+		}
+	}
+
 	@Override
 	public void renderParticle(Tessellator tess, float l, float rX, float rY, float rZ, float rYZ, float rXY)
 	{
@@ -54,15 +66,7 @@ public class LightningFX extends EntityFX
 		tess.setColorRGBA_F( this.particleRed * j * 0.9f, this.particleGreen * j * 0.95f, this.particleBlue * j, this.particleAlpha );
 		if ( particleAge == 3 )
 		{
-			double lastDirectionX = (rng.nextDouble() - 0.5) * 0.9;
+			regen();
-			double lastDirectionY = (rng.nextDouble() - 0.5) * 0.9;
-			double lastDirectionZ = (rng.nextDouble() - 0.5) * 0.9;
-			for (int s = 0; s < steps; s++)
-			{
-				Steps[s][0] = lastDirectionX = (lastDirectionX + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
-				Steps[s][1] = lastDirectionY = (lastDirectionY + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
-				Steps[s][2] = lastDirectionZ = (lastDirectionZ + (rng.nextDouble() - 0.5) * 0.9) / 2.0;
-			}
 		}
 		double f6 = this.particleTextureIndexX / 16.0;
 		double f7 = f6 + 0.0324375F;