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Author Topic: (Problem) Newbie here, need help with animations - Mandelbulb 3D  (Read 730 times)

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Offline Nodge

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(Problem) Newbie here, need help with animations - Mandelbulb 3D
« on: July 18, 2018, 01:34:40 PM »
Hi all. I've just discovered Mandelbulb 3D and I'm totally hooked. With very little effort,and without really knowing what I was doing I managed to produce this simple animation ...


From what I remember I just saved a keyframe in the animation window and then changed a value in the formula and clicked on the Formula button in the Navigator so that the new shape appeared and then saved another keyframe to the animation and then rendered it. The above video is actually the rendered video played twice, the 2nd being reversed to get the pulsating effect.

But now for the life of me I can't reproduce that. I can produce an animation by simply changing position and flying around and saving keyframes but I want the actual fractal to change shape and now when I change values in the formula and save a keyframe to the animation I'm expecting to get a smooth transition in shape over 50 frames but what I get is a sudden jump from one shape to the next at a certain frame. There's a start shape and an end shape with an interim shape in the middle. See here...


I'm obviously doing something wrong but can't figure out what it is.

I'm also confused about the actual number of frames being produced. What makes sense to me is that I have a start keyframe (no. 1) and an end keyframe (no. 2) with 50 frames in between so when I render that I should get 50 frames (or is it 51?) When rendering starts I get a message saying rendering 1 of 51., but when the count gets to 51 of 51 it just carries on with 52 of 51 and I get a total of 100 frames before it stops. So what is happening there?


Linkback: https://fractalforums.org/index.php?topic=1603.0
« Last Edit: July 18, 2018, 02:03:00 PM by Nodge »

Offline Taojoe

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Re: Newbie here, need help with animations - Mandelbulb 3D
« Reply #1 on: July 20, 2018, 03:56:53 AM »
Hi Nodge,
If you can, upload the .m3a (animation parameter file) to a reply here.
That would assist in debugging.

Offline Nodge

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Re: Newbie here, need help with animations - Mandelbulb 3D
« Reply #2 on: July 21, 2018, 08:50:04 PM »
After a lot of fiddling about I've found that animation just doesn't work if you only have one formula. For example if you start with the default Integer Power formula and save the initial state as a keyframe and then change the integer power value from 8 to 4 and then save that state as your second keyframe and then render a preview the animation doesn't work as I would expect it to - you just get sudden jumps from one shape to the next. However, if you now start again with Integer Power as formula 1 and then add a second formula, Aexion C for example and then save that as Keyframe 1, and then you change a value in Aexion C - say Float Power from 8 to 5 and then save that as your second keyframe and then do an animation preview you will find that everything tweens smoothly between the 2 keyframes. Don't know if this is a bug or a "feature" and there is a good reason for it.

Offline Ion D-worth

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Re: Newbie here, need help with animations - Mandelbulb 3D
« Reply #3 on: June 06, 2019, 02:51:43 AM »
To fix the issue in the second video, where the shape of the fractal changed suddenly instead of smoothly, use the Real Power formula instead of the default Integer Power formula. The Real Power formula allows you to make the power any real number, allowing for smooth changes, where as the Integer Power formula only lets you make it an integer, making the change sudden.
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Offline Sabine62

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Re: Newbie here, need help with animations - Mandelbulb 3D
« Reply #4 on: June 06, 2019, 11:17:42 AM »
Exactly, the problem does not have anything to do with having just one formula (one formula can give great animations ;) )but with the actual integer power formula which can't be interpolated ;)  :thumbs:

The 50 'extra' frames can be solved by setting the number of frames on the last keyframe to 1.
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