Shaders Manual / Tutorial ?

local eff="ripple1" -- effect name

-- the following lines are to make sure the shader is compiled, 
-- a shader is mini program, that needs to be compiled to use it

shaderAddEffect(eff)
shaderRemoveEffect(eff)

-- this is a standard setting, the shader has a variable that is called strength, we set that to 1

shader_effects[eff].num.strength=1

-- also for any animation inside the shader, it needs the time, 
-- so we bind the variable time in the shader to our time

bind(eff, "time", field("shader_iTime"))

shaderSetOptions({{shader = shader_effects[eff].num(), comp_dst=5, comp_src=4 }}, 1)

-- simplest thing of them, set the object "target_object" to the effect channel 1
Scenes.stadtpark_see.Objects.gfx_see_wasser.ShaderSet = 1

local eff = "ripple1"
local obj = "gfx_see_wasser"

shaderRemoveEffect(eff)
shaderAddEffect(eff)

bind(eff, "time", field("getTime()*0.001"))

shader_effects[eff] = { shader = Shaders[eff].Compiled }

Objects[obj].ShaderSet = shader_effects[eff].num.num