I recently began to look into Godot's shading language, and I'm having quite a hard time understanding how to actually code in it (I'm new to programming).
I want my sprites to have a drop shadow (as in example 8 of the demo project "2D shaders for sprites") and I want the radius of the shadow to change with time. To be more specific, I want it to grow bigger and smaller in loop. Can someone help me in achieving this?
Also, since I'm working on a mobile game, I was wondering: achieving glow and shadow effects with shaders instead of sprites is much more convenient for me, but is it efficent for the device? Is it better to rely on RAM instead of GPU?