There's a bunch of shader stuff & examples on the luadocs page, but it doesn't really explain how to use or write custom shaders. I think if you want to write custom shaders then you will likely have to use google to find some places to learn GLSL.

Just tested changing between scenes after I used a play sound indefinitely action part. If you fade to the next scene when using change scene then it will fade out & stop the sound. If you change to the next scene instantly then the sound will carry on playing. If you want fade then you could do it manually with an interface or with Lua script & changing the scene brightness - or game brightness/contrast if you use the shader tool kit or a custom shader, but the scene brightness won't affect interfaces & the shader toolkit option depends on whether or not you have told it to omit interfaces, fonts, etc.

First, the shadery Stuff:1) Here is a Mirror-Reflection-Shade I have offered some Time ago: https://www.dropbox.com/s/k0wg4cyyta9rlr3/reflection_shader.zip?dl=0 6) If you just want wavey Distortions, you should find a Shader for that in the Shader-Toolkit. But here is a Distortion-Script of mine that utilizes a moving Cloud-Texture: https://www.dropbox.com/s/vyniph7yis67v2k/heatwave_shader.zip?dl=0 (I hope these Scripts still work well, otherwise I might have to make some Adjustments.) ~~~2) The somewhat clumsy Way I have made a Tangram-System with drag-and-droppable Pieces in my Game was to have the Cursor turn into a Cursor that looks like the Piece while hiding the Piece itself, and placing it where the Cursor clicks while setting the Cursor back to normal. (And if the Cursor clicks a little invisible Field surrounding the Position where the Cursor would have to be for the Piece to be set in the right Spot, clicking will make the Piece snap into Position, even if the Cursor has not been on the exact Spot.) Depending on the Amount of Pieces you have in your Puzzle, can be a Bit of a Chore to set up though. 3) You could lua-code several randomized points around the Player and have the other Characters follow those Points instead of the Player directly. I have never tried that though, I didn't need the Follow Character Actionpart so far. (But I am relatively sure that the one Scene you have referred to in that Dig-Video is probably scripted, it's somewhat cutsceney.)

Thanks for fast reply1 & 6 : Which one of shaders? Did you mean is Shader toolkit? It haven't mirror AFAIK2 : Would you mind find it and give a link? I so need it for my game3 : Best example for chase of follow is "The Dig" game. NPC walking in scene at full random positions and many times look at player that is very similar to AGS follow system.4 : ..... Maybe Simon that help for it......5 : Please see this link:https://www.dropbox.com/s/c8ltx5434cwqdxd/Video_2018-05-25_162028.wmv?dl=0

I have found another Bug -- albeit a fancy one. The Shader-Tiling seems to be messed up -- these Moons should not be repeating, they should actually be clipped.Also, it seems to me that there is an Issue with playing an Animation and waiting until it has ended, the Engine doesn't seem to wait properly, and it can screw up entire Animation-Chains. (For Example, my Character enters a Scene, walks up to a certain Position, should be playing a Turn-Animation and right afterwards a Kneeling-Animation changing the Outfit to a Kneeling-Outfit, then she should be saying a Line in that Outfit before standing up again and turning around again -- but instead, the Turn-Animations appear only for a brief Moment, the Kneeling-Animation doesn't play at all, she says her Line while standing, then suddenly is in her Kneeling-Outfit, with which she then moves around afterwards if I control her... it is all jumbled up.)Those Animations have Action-Frames for changing Alignment and Outfit, if that is of any Importance.(Sidenote: I have also updated my Windows to Service Pack 2 to see if it might help my Audio-Problem, but the Music -- and only the Music -- still is as distorted as before.)