Jump tunnel fixes

Ship the x64 client and renderer from REM-Client
c238ef4a6b2386ba0dd4016951dbd22df267397f.

Update gate tunnel colours, alpha controls and scrolling/twist parameters;
add a separate violet jump-hole profile and matching background fades.
Include the compiled renderer, detail tiers and corrected build provenance.

Verified all 11,143 runtime/data files against the Lutris installation,
five completed singleplayer jumps, four detail levels and options Save.
GPU regressions passed on NVIDIA and Intel; player saves/settings were
restored unchanged. Multiplayer flight remains untested.

DATA/FX/gate_tunnel.ini

@@ -24,8 +24,8 @@ max_rgb = 0, 0, 100
 [layer]
 texture = jumptube
 color = 0, 0, 200
-near_alpha_factor = 0.8
-far_alpha_factor = 0
+near_alpha = 0.8
+far_alpha = 0
 radius_factor = 1.5
 u_offset = 0
 v_offset = 0
@@ -36,8 +36,8 @@ v_scale = 10
 [layer]
 texture = jumptube5
 color = 100, 200, 255
-near_alpha_factor = 1
-far_alpha_factor = 0
+near_alpha = 1
+far_alpha = 0
 radius_factor = 1
 u_offset = 0.5
 v_offset = 0.33
@@ -71,8 +71,8 @@ max_rgb = 255, 255, 255
 [layer]
 texture = jumptube
 color = 0, 0, 200
-near_alpha_factor = 0.8
-far_alpha_factor = 0
+near_alpha = 0.8
+far_alpha = 0
 radius_factor = 1.5
 u_offset = 0
 v_offset = 0
@@ -83,8 +83,8 @@ v_scale = 10
 [layer]
 texture = jumptube5
 color = 255, 255, 255
-near_alpha_factor = 1
-far_alpha_factor = 0
+near_alpha = 1
+far_alpha = 0
 radius_factor = 1
 u_offset = 0.5
 v_offset = 0.33
@@ -110,34 +110,34 @@ near_alpha = 1
 far_alpha = 1
 num_t_steps = 200
 num_s_steps = 12
-min_rotation = 3
-max_rotation = -3
+min_rotation = -0.35
+max_rotation = 0.35
 min_rgb = 0, 0, 30
-max_rgb = 0, 0, 100
+max_rgb = 16, 30, 65
 
 [layer]
 texture = jumptube
 color = 0, 0, 200
-near_alpha_factor = 0.8
-far_alpha_factor = 0
+near_alpha = 0.8
+far_alpha = 0
 radius_factor = 1.5
 u_offset = 0
 v_offset = 0
-du = 0.1
+du = 0.055
 dv = 0.07
 v_scale = 10
 
 [layer]
 texture = jumptube5
 color = 100, 200, 255
-near_alpha_factor = 1
-far_alpha_factor = 0
+near_alpha = 1
+far_alpha = 0
 radius_factor = 1
 u_offset = 0.5
 v_offset = 0.33
-du = -0.2
-dv = 0.1
-v_scale = 15
+du = -0.095
+dv = 0.16
+v_scale = 13.7
 
 [gate_tunnel]
 nickname = gate_tunnel_liberty
@@ -165,8 +165,8 @@ max_rgb = 100, 100, 255
 [layer]
 texture = jumptube
 color = 50, 50, 200
-near_alpha_factor = 1
-far_alpha_factor = 0
+near_alpha = 1
+far_alpha = 0
 radius_factor = 1
 u_offset = 0
 v_offset = 0
@@ -177,8 +177,8 @@ v_scale = 10
 [layer]
 texture = jumptube5
 color = 0, 50, 255
-near_alpha_factor = 0.5
-far_alpha_factor = 0.3
+near_alpha = 0.5
+far_alpha = 0.3
 radius_factor = 1
 u_offset = 0.5
 v_offset = 0.33
@@ -186,3 +186,52 @@ du = -0.05
 dv = 0.7
 v_scale = 10
 
+
+; REM: irregular jump-hole presentation; no route/protocol changes.
+[gate_tunnel]
+nickname = rem_tunnel_hole
+write_depth_buffer = 0
+num_spline_control_points = 9
+x_range = 850
+y_range = 700
+z_range = 20000
+min_radius = 50
+max_radius = 100
+far_radius_factor = 0
+min_speed = 0.003
+max_speed = 0.08
+time_to_max_speed = 5
+fade_distance = 0.1
+near_alpha = 1
+far_alpha = 1
+num_t_steps = 200
+num_s_steps = 12
+min_rotation = -0.85
+max_rotation = 0.85
+min_rgb = 0, 0, 30
+max_rgb = 16, 30, 65
+
+[layer]
+texture = jumptube
+color = 55, 25, 140
+near_alpha = 0.8
+far_alpha = 0
+radius_factor = 1.5
+u_offset = 0
+v_offset = 0
+du = 0.055
+dv = 0.07
+v_scale = 10
+
+[layer]
+texture = jumptube5
+color = 130, 145, 255
+near_alpha = 1
+far_alpha = 0
+radius_factor = 1
+u_offset = 0.5
+v_offset = 0.33
+du = -0.16
+dv = 0.16
+v_scale = 11.3
+