Thanks guys!
Yes I'm leaning toward the first sample with more dramatic lighting too. I like the luxuriousness of the gold in the second, but the initial spinning coin is hard to see in the second version. This will be for a viral video type ad (similar to my Trick Shot viral video ad) so it has to grab your attention in a feed like on facebook. So the more dramatic lighting in the first one works best for that purpose.
I used bullet dynamics with a lot of tweaking to the settings until I had a good feel of motion. The initial coin spin is keyframed until it starts to tip over, then the dynamics take over. For all the early splitting/stacking coins I had to use a sequence of many different techniques together to get the effect I wanted.
1) I did a bullet dynamic simulation until the coin came close to rest.
2) I saved the motion out as an MDD (they tend to keep jittering so I had to pin it down with MDD loaded only to the frame where it's almost stopped.)
3) I loaded the motion back onto the coin and turned off the dynamics on that coin.
4) I saved the coin out at the end of the motion as a transformed object.
5) I loaded the transformed coin back in and re-positioned the pivot point centered on the transformed coin.
6) I cloned the transformed coin and hid the original. I set bullet on both of the coins.
7) I set keyframes on the coin that will stay put and catch the second coin so that it won't move till later (using activate after last keyframe)
8) I keyframed that new transformed copy to pop up and start flipping.
9) I then let bullet take over the flip and fall onto the original coin below, tweaking settings and keyframes until I got it to land and stay on the coin below without bouncing off.
I repeated this process for the first three sets of coins that split/flip and stack.
I then set keyframes on all of those (set to activate after last keyframe) to hold them in place until the other coins start raining down and let bullet take over for them again so they eventually are bounced and pushed out of the way in the deluge.
For all the raining coins I set 2 keyframes of the coin up out of frame to start the coin moving/spinning and let bullet take over from there.
Out of frame there's a cylinder around the coins which is made from the top ridge from the pot of gold, to keep them all in place so the final set of coins matches the pot of gold. When the coins come to rest we'll pull back and reveal that we've filled a pot of gold.
I'm currently wrestling with freezing the coins in place at the end so that I can have them move with the pot of gold which is slightly offset/tipped in the next shot.
I've saved them all out to MDD with the multi-baker and loaded them back in with the multi-loader but I'm having trouble getting them re-positioned. Using world space keeps them perfectly aligned, but then they won't move with the pot of gold. Loading them in with object space and then zeroing out the position/rotation of the coin objects does something weird. It loads the first coin in position but all the rest are dropped down around the origin but not exactly where I would think they would be related to the original origin. Almost like they are at the center of gravity of the final group. I then instead tried using an FBX export and reading the objects into modeler as layers so I could have all the coins as one frozen object but they are only coming in in their initial positions, not the final resting positions even though I specified only the last frame. It was late and I was tired when I stopped last night so I'll take another look at it today to figure out what's going on.
Next step is to animate the start of the rainbow, which will begin as a pencil thin light when the first coin splits and filps, and then expand and grow as the coins rain down. Then we'll pull back to reveal the pot of gold in the external scene (transitioning the lighting during the pullback). Then I need to rig some of the plants so I can add a subtle motion to some of the plants so the external scene isn't abnormally still during the final pull back reveal.
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Originally Posted by JohnMarchant
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