Moin Simon,vielen Dank für deine schnelle Antwort.Schade, dass es (derzeit) keine Lösung dazu gibt. Dann muss ich mir etwas anderes überlegen.Das Objekte verzerren mittels Shader interessiert mich trotzdem (;

It's not about generating character shadows. At all. It's about the open GL Shader in general. We were talking about applying shader effects to specified scene objects &/or characters.The[i]entire[/i] thread though is about the [b]shader[/b] in [i]general[/i].@ Simon: there's some funny stuff happens when you try applying certain effects to objects/animations. Some of the effects complete hide the object/animation & some of them draw the entire objects shape (background in one color, alpha with corrupted version of the effect).

Some effects work, some do not. Problem is I have to rewrite big portions of the script to make these possible. Saturation, lightness and such have the problem, that they are applied at the end of the chain, so I would need at least 2 copies of the shader and also a possibility to control both seperately. Blur and glow are adding to the problem that these are multipass effects and I also need to be careful with bleeding on the edge... The glow is just copying the colors and filtering them so only the bright colors are left, then just a blur on that and add it to the screen.

[code]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 itshaderAddEffect(eff)shaderRemoveEffect(eff)-- this is a standard setting, the shader has a variable that is called strength, we set that to 1shader_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 timebind(eff, "time", field("shader_iTime"))--[[ that is tricky, it contains the settings for something we could call "effect channel", like in an audio mixer, send to channel 1 or such. So we say use the shader "eff" and composition method 5 and 4, list of methods here:0 GL_ZERO1 GL_ONE2 GL_SRC_COLOR3 GL_ONE_MINUS_SRC_COLOR4 GL_SRC_ALPHA5 GL_ONE_MINUS_SRC_ALPHA6 GL_DST_ALPHA7 GL_ONE_MINUS_DST_ALPHA8 GL_DST_COLOR9 GL_ONE_MINUS_DST_COLOR10 GL_SRC_ALPHA_SATURATEthe comp dst means what of the destination goes into the equationand comp src the same for source. So we use the alpha channel of the source image (GL_SRC_ALPHA) and for the destination the inverse (GL_ONE_MINUS_SRC_ALPHA).Destination means our surface, source is the image we are drawing.If we use GL_ONE, GL_ONE you will see that image is like blended onto the surface because the colors are added. ]]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 1Objects.target_object.ShaderSet = 1[/code]

Yep, possible, but depends on the effect.Most of the additional effects can be used like this:[code]local eff="ripple1"shaderAddEffect(eff)shaderRemoveEffect(eff)shader_effects[eff].num.strength=1bind(eff, "time", field("shader_iTime"))shaderSetOptions({{shader = shader_effects[eff].num(), comp_dst=5, comp_src=4 }}, 1)Objects.target_object.ShaderSet = 1[/code]Change the target_object to your objects name an ripple1 to the desired effect. Should create a nice ripple, good for some lake.The other effects require some rework to the script. Blur and glow are not possible with the current version, don't know if I do that in the future.