lightning storm visual for the wand

game/modules/tome/data/general/objects/egos/wands-powers.lua

@@ -69,7 +69,7 @@ newEntity{
 		local MapEffect = require "engine.MapEffect"
 		who:project(tg, x, y, function(px, py)
 			game.level.map:addEffect(who, px, py, 5, DamageType.LIGHTNING_DAZE, dam, 0, 5, nil, 
-				MapEffect.new{color_br=30, color_bg=150, color_bb=160, effect_shader="shader_images/retch_effect.png"}, nil, true)
+				{zdepth=6, type="lightning_storm"}, nil, true)
 		end)
 		game:playSoundNear(who, "talents/lightning")
 		return {id=true, used=true}

game/modules/tome/data/gfx/particles/lightning_storm.lua

+-- ToME - Tales of Maj'Eyal
+-- Copyright (C) 2009 - 2018 Nicolas Casalini
+--
+-- This program is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program.  If not, see <http://www.gnu.org/licenses/>.
+--
+-- Nicolas Casalini "DarkGod"
+-- darkgod@te4.org
+
+base_size = 64
+can_shift = true
+
+local nb = 0
+local nextp = 5
+
+return { blend_mode=core.particles.BLEND_SHINY, generator = function()
+	local ad = rng.range(0, 360)
+	local a = math.rad(ad)
+	local dir = math.rad(ad)
+	local r = rng.range(0, 32)
+
+	return {
+		life = 100,
+		size = rng.range(70, 100), sizev = -0.9, sizea = 0,
+
+		x = r * math.cos(a), xv = 0, xa = 0,
+		y = r * math.sin(a), yv = 0, ya = 0,
+		dir = 0, dirv = 0, dira = 0,
+		vel = 0, velv = 0, vela = 0,
+
+		r = 1,   rv = 0, ra = 0,
+		g = 1,   gv = 0, ga = 0,
+		b = 1,   gv = 0, ga = 0,
+		a = rng.float(0.05, 0.08),   av = 0.0152, aa = -0.001,
+	}
+end, },
+function(self)
+	if nb == 0 then self.ps:emit(1) end
+	nb = nb + 1
+	if nb >= nextp then
+		nb = 0
+		nextp = rng.range(3, 15)
+	end
+end,
+10, "particles_images/lightning_storm_"..rng.range(1, 5)