Fading objects more efficiently ?

Questions & Answers
1

Scenario: Many objects are flying around in my scene ( 2D , around 20 lets say ) and each one of them has a script to fade the object out before being destroyed:

Color color = gameObject.renderer.material.color;
float alpha = color.a;
color.a = Mathf.Lerp(alpha,0,0.01f);
gameObject.renderer.material.color = new Color(color.r,color.g,color.b,color.a);

Debug.Log("Color Fading");

However, at the time when fading begins the fps drops by around 30, so this isnt very performance efficient, is there any more efficient method ?

EDIT: i know it wouldnt matter if it was one object fading at one time, but it will be around 5-15 objects fading at the same time

EDIT 2: using transparent specular shader

2

Use transparent diffuse shader instead of transparent specular shader.

3

Try removing the Debug.Log() calls, if you’re doing lots of those every frame it’s going to slow it down quite a bit.

By the way you have a constant interpolation fraction, is this actually fading anything?