Chaotica Animation - Blinking Stars

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tatasz's avatar
Two quick recipes for animated blinking stars in Chaotica.

In this tutorial, I will always use FPS 10. To get the frame numbers for FPS 30, just multiply the given values by 3.

For this tutorial, you will need Chaotica 1.5.2 or above (check website).

Adding the Stars

First, lets add the stars. In the World Editor, add a new iterator. Then, add a new transform to it and replace linear with a small amount of noise:

1 Noise by tatasz

The amount of noise will change the size of the stars:

Noise-amount by tatasz

1 - Blink by changing the noise amount

Lets say we want our stars blink once a second. This means we will need 2 keyframes a second: the star will need to get big and then back to small in one second.

So, at time 0:

2 Anim by tatasz

The amount of noise will be 0.005 for example:

2 Noise by tatasz

Now, lets add a keyframe. 2 keyframes a second means 1 keyframe every 0.5 second. Move the slider to the right till you reach the right time (you can also input the frame number: 0.5 * 10fps = 5).

3 Anim by tatasz

Switch to the editor and increase the amount of noise:

3 Noise by tatasz

Advancing more 0.5 second, to frame 10, we need to reduce the amount of noise back to the original value, 0.005. And then repeat it all until the end of the animation:

Time        Frame        Noise amount
0                0                0.005
0.5             5                0.1
1                10              0.005
1.5             15              0.1
2                20              0.005
2.5             25              0.1

The result should look like this:

Gif1 by tatasz

You can achieve a similar effect by scaling the post affine up and down.

2 - Blink by changing the weights

Changing the weights also produces a blinking effect.

4 Weights by tatasz

Lets do the same we did in 1, but changing base weight of the iterator which contains our stars instead of noise amount. Something like this:

Time        Frame        Base weight
0                0                0.02
0.5             5                0.2
1                10              0.02
1.5             15              0.2
2                20              0.02
2.5             25              0.2

You will get something like this:

Gif2 by tatasz

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  • Written by Steve Patterson. In this Photoshop effects tutorial, we'll learn how to easilyadd a star-filled sky to a night time photo. This version of the tutorial 

  • __________________________
  • ASD

LMcentury21's avatar
God you're so smart! Thanks for all those tutorials, I don't have enough time to try them but I will !
lyc's avatar
yeahhhh and she calls herself "dummy" all the time... fishing for compliments maybe? :lol:
LMcentury21's avatar
Totally fishing for compliments ;)
tatasz's avatar
:hug: welcome ^^
if you got some tutorial requests, that would be awesome too ^^ got a coloring one cooking but thats it =D
LMcentury21's avatar
If I have an idea I will tell you!
IgorDa's avatar
thank you very much!!!
very cool!!
tatasz's avatar
lyc's avatar
another amazing tutorial :aww: are you suuuure you're getting enough rest?!

oh and one thing maybe worth saying is that you need chaotica 1.5.2 (available on the website since ages but still unannounced...) for the animated weights.
tatasz's avatar
:aww: thanks, and nah, this stuff doesn´t take that much time ^^ in fact, i procastinate several hrs a day =D
also, thanks for the observation ^^
skulkey's avatar
tatasz's avatar
hmmm actually, i sleep 8 hrs a day and procastinate 4 hrs a day ^^ not sure if any of that is resting
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