# storm_stone Procedural rain-soaked ashlar masonry in world space: courses of blocks with per-block tint, bevelled joints, weathering streaks, lichen and running water that darkens the stone and drops its roughness. It is an engine-lit `surface()` shader that fills a `PbrSurface`. The shader projects each face onto the plane it lies in: XZ where the normal is within about 44 degrees of vertical (`|n.y| > 0.72`), otherwise the vertical plane facing X or Z, and scales the result by `scale`. Courses are 0.46 high with blocks 0.8 to 1.5 wide and a random offset per course. Each block is a slightly rounded, chiselled slab with a dark joint; the height of the slab, the chisel and a fine grain bend the normal by `bump`. Joints and bump fade out where the pattern gets too fine for the screen (measured with `fwidth`), where the colour also eases toward a flat grey `(0.21, 0.20, 0.20)`. The stone is a cool grey with warm variation per block, dark vertical stains hang from the joints, and green lichen and grime creep up from the plinth below world height 7. Water sheets down the walls in streaks that slide with time: wetness is 0.7 of `wet` between the streaks and rises along them, darkening the albedo by up to half and dropping roughness from 0.9 to 0.16 (1.35 times that in the joints). Reflectance is 0.6 and occlusion is lower in the joints. The `tower` graph (`storm/tower.procGraph`) builds the stone keep of the Procgen Effects Showcase world's `fx_storm` scene with it through `stoneMat`, with `scale` 1.0, `wet` 0.9 and `bump` 1.0. ## Properties | Property | Type | Default | Meaning | |---|---|---|---| | `scale` | float | 1.0 | Scale of the masonry pattern; larger values give smaller blocks (range 0.2 to 4). | | `bump` | float | 1.0 | Strength of the bump normal (range 0 to 4). | | `wet` | float | 0.85 | How soaked the stone is, 0 dry to 1 streaming. |

# effectShowcase The procedural effects of the Procgen Effects Showcase world. Each one is a `.procGraph` that plays through a `Generator`, and every shader, material and module a graph draws with sits beside it in this package, so the package carries everything its graphs need. Each graph's README says what it makes, how to place it and what each of its inputs changes. ## Contents | Folder | Graphs | What they make | |---|---|---| | `combat/` | `impact`, `muzzleFlash`, `tracer` | A round striking a hard surface, the bloom at a barrel as a weapon fires, and the glowing streak of a round in flight. They draw with `fxFlash`, `fxSmoke` and `fxSpark` in `combat/shaders/`. | | `blast/` | `wall_blast` | A charge blowing a breach through a stone block wall, on a 9.6 s loop. | | `storm/` | `storm`, `tower` | A thunderstorm around a lone tower: wind-driven rain, lightning striking on the schedule `schedule.module` keeps, and sparks and smoke where strikes land. `tower` is the stone keep it stands around. | | `rift/` | `arcane_rift` | A rift tearing open in the ground, its motes and rubble moved by the compute shaders in `rift/compute/`. | | `dragon/` | `dragon_breath` | A dragon's fire breath sweeping a courtyard: a flame jet, rolling smoke and drifting embers. | | `launch/` | `launch` | A heavy-lift rocket liftoff on one looping timeline, with the heat-haze material `rk_haze_mat`. | | `waterfall/` | `wf_env`, `wf_water`, `wf_spray`, `wf_foam`, `wf_mist` | A waterfall built in parts: the cliff, basin and boulders, the falling and still water, the droplets, the foam where the falls land, and the mist with its rainbow. Its water materials are in `waterfall/materials/`. | | `shaders/` | | `fx_noise`, the noise functions the waterfall and wall blast shaders include. | ## Playing one A graph plays on a `Generator` component bound to it: ```lua -- `graph` is the graph's reference: the AssetRef `asset.resolve` or a search returns for it. local e = entity.spawn("impact", { position = { 0, 1, 0 } }) e.component.add("Generator", { graph = graph, playOn = "load" }) ``` Set a graph's inputs with the Generator's `params`, e.g. `params = { size = 3 }`.