Grimrock

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defineObject{
	name = "water_surface_example",
	baseObject = "base_floor_decoration",
	components = {
		{ -- All default values are shown here
			-- updates global reflection and refraction maps
			class = "WaterSurface",

			-- This vector is the color of the fog that appears while the
			-- party is underwater. Values above 1 have the same effect as
			-- 1, values below 0 and NaN have the same effect as 0.
			fogColor = vec(0,0,0),

			-- This is how "dense" the fog is, i.e. how quickly it becomes
			-- completely opaque. I am not sure how this is scaled; a value
			-- of 0 (or lower, or NaN) disables the fog entirely, but a
			-- value of 1 does not make the fog reach full opacity immediately
			-- (it takes about 3 meters from the camera to do so).
			--
			-- Interestingly, fog seems to require that a WaterSurfaceMesh be
			-- present on the object, otherwise it doesn't do anything.
			fogDensity = 0,

			-- planeY is the offset of the reflection plane (the plane
			-- about which reflections are calculated). Logically, this
			-- should be the same as the y position of the WaterSurfaceMesh
			-- or whatever other model you're using with the water material,
			-- but there are reasons to set it to other values (it's actually
			-- set to other values often in the standard assets).
			planeY = -1.2,

			-- This vector modifies the color of the reflected scene.
			-- Negative values work.
			reflectionColor = vec(1,1,1),

			-- This vector modifies the color of the refracted scene. (The
			-- refracted scene means the objects that are *beneath*
			-- the water.) Negative values work.
			refractionColor = vec(1,1,1),
		},
		{ -- These aren't defaults
			-- builds a continuous mesh from underwater tiles
			class = "WaterSurfaceMesh",

			-- Material used while the party is above water.
			material = "water_surface_calm",

			-- Material used while the party is underwater.
			underwaterMaterial = "water_surface_underwater",

			-- This is how you change the "water level"; by offsetting the
			-- WaterSurfaceMeshComponent. Remember to adjust the
			-- WaterSurfaceComponent's planeY value. Also, be aware that
			-- positive y offsets can cause very strange behaviour with
			-- 
			offset = vec(0,-1,0),
		},
	},
	dontAdjustHeight = true,
	editorIcon = 264,
}

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defineMaterial{
	name = "ocean_water",
	shader = "ocean_water",
	diffuseMap = "assets/textures/env/ocean_foam_dif.tga",
	normalMap = "assets/textures/env/ocean_normal.tga",
	displacementMap = "assets/textures/env/ocean_disp.tga",
	doubleSided = false,
	lighting = true,
	alphaTest = false,
	blendMode = "Translucent",
	textureAddressMode = "Wrap",
	glossiness = 80,
	depthBias = 0,
	texOffset = 0,
	foamOffset = 0,
	foamAmount = 1,
	waveAmplitude = 50,
	onUpdate = function(self, time)
		self:setParam("texOffset", time*0.2)
	end,
}

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defineTile{
	name = "dungeon_floor_flooded",
	editorIcon = 192,
	color = {120,120,180,255},
	builder = "dungeon",
	floor = {
		"dungeon_floor_dirt_01", 1,
	},
	ceiling = {
		"dungeon_ceiling", 1,
	},
	wall = {
		"dungeon_wall_01", 35,
		"dungeon_wall_02", 35,
		"dungeon_wall_drain", 2,
	},
	pillar = {
		"dungeon_pillar", 1,
	},
	ceilingEdgeVariations = true,
	ceilingShaft = "dungeon_ceiling_shaft",
	underwater = true, -- so that WaterSurfaceMeshComponent builds the mesh over it
	moveSound = "party_move_wade",
}

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defineObject{
	name = "water_surface_flooded_dungeon",
	baseObject = "base_floor_decoration",
	components = {
		{
			class = "WaterSurface",
			planeY = 0.4, -- Notice that the planeY is the same as the y offset of the mesh
			reflectionColor = vec(0.77, 0.9, 1.0) * 0.9,
			refractionColor = vec(1,1,1),
		},
		{
			class = "WaterSurfaceMesh",
			material = "water_surface_calm",
			underwaterMaterial = "water_surface_underwater",
			offset = vec(0,0.4,0),
		},
	},
	dontAdjustHeight = true,
	editorIcon = 264,
}

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defineMaterial{
	name = "water_surface_calm",
	shader = "ocean_water",
	diffuseMap = "assets/textures/env/ocean_foam_dif.tga",
	normalMap = "assets/textures/env/ocean_normal.tga",
	displacementMap = "assets/textures/env/ocean_disp.tga",
	doubleSided = false,
	lighting = true,
	alphaTest = false,
	blendMode = "Translucent",
	textureAddressMode = "Wrap",
	glossiness = 80,
	depthBias = 0,
	texOffset = 0,
	foamOffset = 0,
	foamAmount = 0,
	waveAmplitude = 0.04,	
	onUpdate = function(self, time)
		self:setParam("texOffset", time*0.03)
	end,
}