CompuServe Thread

#Breake the Glass

4 messages in this thread
#175669From: Kouros MoghaddamJun 16, 1995 2:02 AM
Hi everyone, I have a client who wants me to crack the TV screen at the end of the animation. This effect must l@@k real as if lines go in all directions and grow in time, if you know what mean. Any suggestion is appreciated in advance. BTW most software and hardware is available. -Kouros.
#175679From: John EllisJun 16, 1995 2:58 AM
Hey Kouros, >> I have a client who want me to crach the TV screen… this effect must l@@k real… << I've done this a variety of times and have yet to find an ideal approach. The problem is that cracks grow and if you have shards breaking out it gets even more complicated. If the screen just has to look like its cracked, thats not too bad at all. Basically that would be very similar to creating "lightning", and could be done by hand fairly quickly… over a series of frames… If the effect has to crack and reveal something in the background, the only way I've found to create it effectively is through a sequence on model morphs. I would do step one first, ie paint the cracks over time and record them and play them back to insure that it looks right… then I would go back and build several models, the first one would match the first crack of the first hand painted scene… the second would match the second… When the cracks actually reveal something in the background, I would create a boolean shape in the shape of the area that is being reveal and subtract it from the shape that is cracking… this new shape could be manipulate further to provide the second morph target to match the next series of frames… etc. FWIW I've tried creating shards and having them explode outward and while its a neat effect it not the most realistic and certainly awkward as each shape in the lofter actually has to sit on its adjacent shape so that there are no "visible" cracks at the first frame. One can build a shape export it to 3D build, and then with Display on in the shaper view that shape and create a new shape to match it up with… These are complimentary approaches and between the two you have the basic elements from which you should be able to achieve the desired result. Artistry is definitely an element, the rest is patience and skill. <g> Another approach which you may find just as viable and possibly easier it to do a 2d morph with ER or similar package. The cracks would be vector shapes that would morph into your picture element and increase or spread depending on the effect you're looking to achieve… Hope this helps… its a start anyway. <g> John
#175874From: Kouros MoghaddamJun 17, 1995 2:11 AM
John, WoW, Thank you man. That was an in-depth explanation. You are right, this effect is hard to do. I tried ER, AS, 3DS, and AA Pro, and more. The best way I came up with was to paint a sequence of 8 frames over time. The way I did was to copy one frame 8 times. I used lasso in Photoshop and moved jaggedy triangles from the image, thus creating gray color in moved areas. Then took gradient (black+white)paint in AS and applied to cracks. This was my last frame. In Photoshop, I then started to erase my way back so the cracks ended. Played it back in PAR and amazed the client. But you second suggestion is fantastic and I'll print it and it'll remain in my folder. Thanx again. -Kouros
#175890From: John EllisJun 17, 1995 8:10 AM
Kouros, You're quite welcome. I typically start with the paint approach especially for SFX like breaking glass etc. Sometimes like with lighting that hugs the surface of a rounded object you can't use an IPAS, so painting is it. One of the reasons I like to paint these kinds of effects is that its quick. In some cases however the client wants it to look "3D", and I wasn't sure what your situation was… in which case the painting approach becomes a template for what the model needs to do. Either way its a good start, and using the Par makes testing things like this much easier. One of the best reasons to have one IMO. <g> I'd be interested to hear what kind of a spot it was, let me see if I can guess… a promotional spot for marketing selling local baseball, as an added cable feature… and then you could tell me how close I came. <BG> FWIW that's one I've done… a thrill a second. Actually the spot was with the pitcher talking through a TV set to a couch potato eating popcorn, he says a bunch of stuff about how great baseball is and then throws the ball through the TV. The couch potato, startled drops his popcorn to catch it, making a big mess of course. Then they do some more talking and finally the pitcher asks for his ball back. But when the couch potato tries to throw it back, he breaks the TV set…. naturally. <g> Quite silly really, but I guess people liked it, we used to get calls for it all the time… people calling up to see an advertisement?!! Only on cable. <G> That was L.O. which is where I imagine you're doing your thing… now is that a good guess or what? 🙂 C'ya John