Adding patch notes from git, UI, and loading files from the main install path properly.

Also fixed:
* flying wands not pathing properly.
* Lantern particles offset
* Wand fire offset
* Water spray from flask

shaders/render.comp

@@ -27,7 +27,7 @@ layout(std430, set = 0, binding = 39) readonly buffer EntPrev { vec4 prevpos[];
 
 layout(std430, set = 0, binding = 26) readonly buffer Overlay { uint overlay[]; };       // CPU-drawn HUD (ARGB, output pixels)
 struct FLight { vec4 a; vec4 b; };   // x, y, radius (world cells), strength / rgb
-layout(std430, set = 0, binding = 23) readonly buffer Ctrl { ivec4 inp; ivec4 inp2; ivec4 inp3; vec4 outp; vec4 outp2; vec4 view; vec4 hand0; ivec4 hand1; vec4 hand2; } ctrl;
+layout(std430, set = 0, binding = 23) readonly buffer Ctrl { ivec4 inp; ivec4 inp2; ivec4 inp3; vec4 outp; vec4 outp2; vec4 view; vec4 hand0; ivec4 hand1; vec4 hand2; ivec4 burnN; ivec4 burnEv[256]; ivec4 reactN; ivec4 reactEv[64]; ivec4 extra; } ctrl;   // extra.yzw: the Options' brightness, contrast, gamma x 10000 (main.cpp)
 layout(std430, set = 0, binding = 38) readonly buffer FxLights { uint lcount; uint lpad[3]; FLight lights[512]; };   // lights of projectiles and explosions this frame
 
 layout(std430, set = 0, binding = 44) readonly buffer Sky { uint sky[]; };   // src/world/sky.h
@@ -423,7 +423,7 @@ void main() {
     if (p.x >= pc.ow || p.y >= pc.oh) return;
     ivec2 cp = clamp(ivec2(floor(vec2(p + so + vis) / scl)), ivec2(0), ivec2(pc.gw - 1, pc.gh - 1));
     vec3 rgb = unpackUnorm4x8(wcell[cp.y * pc.gw + cp.x].x).rgb;   // (only the colour: the light is read for the player's pixels)
-    if (ctrl.inp2.y != 0 && (ents[0].st.w & 8) == 0) {
+    if (ctrl.inp2.y != 0 && (ents[0].st.w & 8) == 0) {   // (dead: the ragdoll of 00abb7d0 is the body, main.cpp onCreatureDeath(0, true))
         vec2 P = ents[0].a.xy;
         const vec2 pv = prevpos[0].xy;
         if (distance(pv, P) < 10.0) P = mix(pv, P, ctrl.view.z);
@@ -445,6 +445,12 @@ void main() {
             rgb += vec3(0.7, 0.1, 0.0) * a * lh;
         }
     }
+    if (ctrl.extra.y != 0 || ctrl.extra.z != 0 || ctrl.extra.w != 0) {   // the Options' sliders (post_final.frag: + brightness, (c - 0.5) x contrast + 0.5, pow(c, gamma), clamped; 1 + the slider for the last two)
+        rgb += float(ctrl.extra.y) * 1e-4;
+        rgb = (rgb - 0.5) * (1.0 + float(ctrl.extra.z) * 1e-4) + 0.5;
+        rgb = pow(max(rgb, vec3(0.0)), vec3(1.0 + float(ctrl.extra.w) * 1e-4));
+        rgb = clamp(rgb, 0.0, 1.0);
+    }
     {   // the picture without the HUD for the replay recorder (the game's GIFs have no UI): clip_half.comp / main.cpp copy it
         const uvec3 q0 = uvec3(clamp(rgb, 0.0, 1.0) * 255.0 + 0.5);
         clipraw[p.y * pc.ow + p.x] = 0xFF000000u | (q0.r << 16) | (q0.g << 8) | q0.b;