diff --git a/pkg/base/client_start.lua b/pkg/base/client_start.lua
index e7d7081..52a0ad7 100644
--- a/pkg/base/client_start.lua
+++ b/pkg/base/client_start.lua
@@ -450,8 +450,8 @@ function h_tick_main(sec_current, sec_delta)
 			else
 				players[pid] = new_player({
 					name = name,
-					--[=[squad = squads[math.fmod(i-1,2)][
-						math.fmod(math.floor((i-1)/2),4)+1],]=]
+					--[=[squad = squads[(i-1) % 2][
+						(math.floor((i-1)/2) % 4)+1],]=]
 					squad = nil,
 					team = tidx,
 					weapon = wpn,
@@ -655,10 +655,10 @@ function h_tick_init(sec_current, sec_delta)
 	for i=1,players.max do
 		players[i] = new_player({
 			name = (players.current == i and user_config.name) or name_generate(),
-			--[=[squad = squads[math.fmod(i-1,2)][
-				math.fmod(math.floor((i-1)/2),4)+1],]=]
+			--[=[squad = squads[(i-1) % 2][
+				(math.floor((i-1)/2) % 4)+1],]=]
 			squad = nil,
-			team = math.fmod(i-1,2), -- 0 == blue, 1 == green
+			team = (i-1) % 2, -- 0 == blue, 1 == green
 			weapon = WPN_RIFLE,
 		})
 	end
diff --git a/pkg/base/lib_bits.lua b/pkg/base/lib_bits.lua
index 4d029f9..229ba4d 100644
--- a/pkg/base/lib_bits.lua
+++ b/pkg/base/lib_bits.lua
@@ -17,7 +17,7 @@
 
 function bit_unsign(a,m)
 	m = math.pow(2,m)
-	local v = math.fmod(a,m)
+	local v = (a % m)
 	if v < 0 then
 		v = v + m
 	end
@@ -28,7 +28,7 @@ function bit_xor(a,b)
 	local shift = 1
 	local v = 0
 	while a > 0 and b > 0 do
-		if (math.fmod(a,2) ~= 0) ~= (math.fmod(b,2) ~= 0) then
+		if ((a % 2) ~= 0) ~= ((b % 2) ~= 0) then
 			v = v + shift
 		end
 		shift = shift * 2
@@ -42,7 +42,7 @@ function bit_or(a,b)
 	local shift = 1
 	local v = 0
 	while a > 0 and b > 0 do
-		if (math.fmod(a,2) ~= 0) or (math.fmod(b,2) ~= 0) then
+		if ((a % 2) ~= 0) or ((b % 2) ~= 0) then
 			v = v + shift
 		end
 		shift = shift * 2
@@ -56,7 +56,7 @@ function bit_and(a,b)
 	local shift = 1
 	local v = 0
 	while a > 0 and b > 0 do
-		if (math.fmod(a,2) ~= 0) and (math.fmod(b,2) ~= 0) then
+		if ((a % 2) ~= 0) and ((b % 2) ~= 0) then
 			v = v + shift
 		end
 		shift = shift * 2
diff --git a/pkg/base/lib_map.lua b/pkg/base/lib_map.lua
index af7722c..d07498d 100644
--- a/pkg/base/lib_map.lua
+++ b/pkg/base/lib_map.lua
@@ -190,17 +190,17 @@ function map_hashcoord3(x,y,z)
 	xlen,ylen,zlen = common.map_get_dims()
 	
 	return 
-		 math.fmod(math.fmod(y,ylen)+ylen,ylen)
-		+ylen*(math.fmod(math.fmod(x,xlen)+xlen,xlen)
-		+xlen*math.fmod(math.fmod(z,zlen)+zlen,zlen))
+		 (y % ylen)
+		+ylen*(x % xlen)
+		+xlen*(z % zlen)
 end
 
 function map_hashcoord2(x,z)
 	local xlen,ylen,zlen
 	xlen,ylen,zlen = common.map_get_dims()
 	
-	return math.fmod(math.fmod(x,xlen)+xlen,xlen)
-		+xlen*math.fmod(math.fmod(z,zlen)+zlen,zlen)
+	return (x % xlen)
+		+xlen*(z % zlen)
 end
 
 function map_chkdisbrk(x,y,z)
diff --git a/pkg/base/lib_vector.lua b/pkg/base/lib_vector.lua
index df3e628..d0423ab 100644
--- a/pkg/base/lib_vector.lua
+++ b/pkg/base/lib_vector.lua
@@ -15,6 +15,25 @@
     along with Ice Lua Components.  If not, see <http://www.gnu.org/licenses/>.
 ]]
 
+function trace_gap(x,y,z)
+	local xlen,ylen,zlen
+	xlen,ylen,zlen = common.map_get_dims()
+	
+	local l = common.map_pillar_get(math.floor(x), math.floor(z))
+	i = 1
+	local h1,h2
+	h1 = nil
+	while true do
+		h2 = l[i+1]
+		if h2 == ylen-1 then h2 = ylen end
+		if y < l[i+1] or l[i] == 0 then return h1, h2 end
+		i = i + l[i]*4
+		if y < l[i+3] then return h1, h2 end
+		h1 = l[i+3]
+		h2 = l[i+1]
+	end
+end
+
 function box_is_clear(x1,y1,z1,x2,y2,z2,canwrap)
 	local x,z,i
 	
@@ -216,9 +235,9 @@ function trace_map_box(x1,y1,z1, x2,y2,z2, bx1,by1,bz1, bx2,by2,bz2, canwrap)
 	
 	-- sub deltas
 	local sx, sy, sz
-	sx = math.fmod(x1, 1.0) - 0.001
-	sy = math.fmod(y1, 1.0) - 0.001
-	sz = math.fmod(z1, 1.0) - 0.001
+	sx = (x1 % 1.0) - 0.001
+	sy = (y1 % 1.0) - 0.001
+	sz = (z1 % 1.0) - 0.001
 	if gx >= 0 then sx = 1-sx end
 	if gy >= 0 then sy = 1-sy end
 	if gz >= 0 then sz = 1-sz end
diff --git a/pkg/base/main_server.lua b/pkg/base/main_server.lua
index c776f29..216a793 100644
--- a/pkg/base/main_server.lua
+++ b/pkg/base/main_server.lua
@@ -28,12 +28,12 @@ function slot_add(sockfd, tidx, wpn, name)
 		if not players[i] then
 			if tidx < 0 or tidx > 1 then
 				-- TODO: actually balance this properly!
-				tidx = math.fmod(i-1,2)
+				tidx = (i-1) % 2
 			end
 			players[i] = new_player({
 				name = name,
-				--[[squad = squads[math.fmod(i-1,2)][
-					math.fmod(math.floor((i-1)/2),4)+1],]]
+				--[[squad = squads[(i-1) % 2][
+					(math.floor((i-1)/2) % 4)+1],]]
 				squad = nil,
 				team = tidx, -- 0 == blue, 1 == green
 				weapon = WPN_RIFLE,
@@ -406,23 +406,6 @@ map_fname = map_fname or MAP_DEFAULT
 map_loaded = common.map_load(map_fname, "auto")
 common.map_set(map_loaded)
 
--- spam with players
---[=[
-players.local_multi = math.floor(math.random()*32)+1
-
-for i=1,players.max do
-	players[i] = new_player({
-		name = name_generate(),
-		--[[squad = squads[math.fmod(i-1,2)][
-			math.fmod(math.floor((i-1)/2),4)+1],]]
-		squad = nil,
-		team = math.fmod(i-1,2), -- 0 == blue, 1 == green
-		weapon = WPN_RIFLE,
-	})
-	print("player", i, players[i].name)
-end
-]=]
-
 intent[#intent+1] = new_intel({team = 0, iid = #intent+1})
 intent[#intent+1] = new_tent({team = 0, iid = #intent+1})
 intent[#intent+1] = new_intel({team = 1, iid = #intent+1})
diff --git a/pkg/base/obj_intent.lua b/pkg/base/obj_intent.lua
index ec48224..87f59c2 100644
--- a/pkg/base/obj_intent.lua
+++ b/pkg/base/obj_intent.lua
@@ -275,7 +275,7 @@ function new_tent(settings)
 					plr.tent_restock()
 				end
 				
-				if plr.has_intel then
+				if plr.has_intel and plr.team == this.team then
 					plr.intel_capture(sec_current)
 				end
 			end
diff --git a/pkg/base/obj_player.lua b/pkg/base/obj_player.lua
index 3d9393d..e95269d 100644
--- a/pkg/base/obj_player.lua
+++ b/pkg/base/obj_player.lua
@@ -748,9 +748,11 @@ function new_player(settings)
 		end
 		if this.crouching or MODE_AUTOCLIMB then
 			by2 = by2 - 1
+			if MODE_AUTOCLIMB then
+				by2 = by2 - 0.01
+			end
 		end
-
-
+		
 		if this.alive then
 			tx1,ty1,tz1 = trace_map_box(
 				ox, oy, oz,
@@ -761,37 +763,68 @@ function new_player(settings)
 		else
 			tx1,ty1,tz1 = nx,ny,nz
 		end
-
-		if this.alive and MODE_AUTOCLIMB then
+		
+		if this.alive and MODE_AUTOCLIMB and not this.crouching then
+			by2 = by2 + 1.01
+		end
+		
+		if this.alive and MODE_AUTOCLIMB and not this.crouching then
 			local jerky = ty1
-			if not this.crouching then
-				ty1 = ty1 - 1
-				by2 = by2 + 1
-			end
-			tx1,ty1,tz1 = trace_map_box(
-				tx1,ty1,tz1,
-				nx, ny, nz,
-				-0.4,  by1, -0.4,
-				0.4,  by2,  0.4,
-				false)
-			if ty1-jerky < -0.8 and not box_is_clear(
-					nx-0.4, ny-0.3-0.5, nz-0.4,
-					nx+0.4, ny-0.3, nz+0.4) then
-				this.crouching = true
-				ty1 = ty1 + 1
-			end
-			if math.abs(jerky-ty1) > 0.2 then
-				this.jerkoffs = this.jerkoffs + jerky - ty1
+			
+			local h1a,h1b,h1c,h1d
+			local h2a,h2b,h2c,h2d
+			local h1,h2,_
+			_,h2 = trace_gap(tx1,ty1+1.0,tz1)
+			h1a,h2a = trace_gap(tx1-0.39,ty1+1.0,tz1-0.39)
+			h1b,h2b = trace_gap(tx1+0.39,ty1+1.0,tz1-0.39)
+			h1c,h2c = trace_gap(tx1-0.39,ty1+1.0,tz1+0.39)
+			h1d,h2d = trace_gap(tx1+0.39,ty1+1.0,tz1+0.39)
+			
+			if (not h1a) or (h1b and h1a < h1b) then h1a = h1b end
+			if (not h1a) or (h1c and h1a < h1c) then h1a = h1c end
+			if (not h1a) or (h1d and h1a < h1d) then h1a = h1d end
+			if (not h2a) or (h2b and h2a > h2b) then h2a = h2b end
+			if (not h2a) or (h2c and h2a > h2c) then h2a = h2c end
+			if (not h2a) or (h2d and h2a > h2d) then h2a = h2d end
+			
+			h1 = h1a
+			h2 = h2a
+			
+			local dh1 = (h1 and -(h1 - ty1))
+			local dh2 = (h2 and  (h2 - ty1))
+			
+			if dh2 and dh2 < by2 and dh2 > 0 then
+				--print("old", ty1, dh2, by2, h1, h2)
+				
+				if (dh1 and dh1 < -by1) then
+					-- crouch
+					this.crouching = true
+					ty1 = ty1 + 1
+				else
+					-- climb
+					ty1 = h2 - by2
+					local jdiff = jerky - ty1
+					if math.abs(jdiff) > 0.1 then
+						this.jerkoffs = this.jerkoffs + jdiff
+					end
+				end
+				
+				--print("new", ty1, this.vy)
+				--if this.vy > 0 then this.vy = 0 end
 			end
 		end
 
 		this.x, this.y, this.z = tx1, ty1, tz1
-
-		this.grounded = (MODE_AIRJUMP and this.grounded) or not box_is_clear(
+		
+		local fgrounded = not box_is_clear(
 			tx1-0.39, ty1+by2, tz1-0.39,
 			tx1+0.39, ty1+by2+0.1, tz1+0.39)
 		
-		if this.alive and this.vy > 0 and this.grounded then
+		--print(fgrounded, tx1,ty1,tz1,by2)
+		
+		this.grounded = (MODE_AIRJUMP and this.grounded) or fgrounded
+		
+		if this.alive and this.vy > 0 and fgrounded then
 			this.vy = 0
 		end