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oxygen_77
06-18-2005, 05:07 PM
Hey, I was wondering if there is a way to get an object to dissolve. This is different from transparency. The reason I'm trying to get this working is to swap out one object for another during animation. In Lightwave you can keyframe the object's dissolve so that one object will go from 0-100% dissolve while the replacement goes from 100-0% dissolve in one frame of animation. Any help would be appreciated!

P.S. keyframing the size of the object from 100%-0 while the replacement's size goes from 0-100% is not the solution I desire.

Thanks!

dreamsgate
06-18-2005, 10:27 PM
In blender, keyframe the alpha of one from 100-0 and the other from 0-100. You can access alpha keyframing by pressing "I" while your cursor is in the edit buttons area.

oxygen_77
06-19-2005, 02:29 AM
In blender, keyframe the alpha of one from 100-0 and the other from 0-100. You can access alpha keyframing by pressing "I" while your cursor is in the edit buttons area.It was my understanding that alpha was used to describe the level of transparency and not object dissolve... i.e. I use alpha with IOR to create a glasslike material. Is there a separate way to dissolve in Blender... Objects with 0% alpha still have specularity and or reflection so this wouldn't work...

Thanks for trying though... ;)

dreamsgate
06-19-2005, 07:15 AM
You can turn off reflections and specularity. Additionally, instead of alpha, you could use the build effect to create a type of disolve.

The build effect can be found by pressing F7 and selecting the effects tab.

tmr232
06-19-2005, 10:59 AM
i think that you can use two seperate scenes (one with the original object and one with the replacement- create a full copy of your scene and then change the object) and combine them using the sequence editor (just place them one after the other)

Apollux
06-19-2005, 02:59 PM
I have done it a couple of times before by keyframing the alpha, ior, spec. etc. on both objects. I worsk. pretty well.

By the way, assuming you planed it well ahead of time, you can turn the "disolve" into a real "morph" if you use Mesh keys on top of the material keys.

oxygen_77
06-19-2005, 04:00 PM
You can turn off reflections and specularity. Additionally, instead of alpha, you could use the build effect to create a type of disolve.

The build effect can be found by pressing F7 and selecting the effects tab.Hmmm... I've always wondered about the build effect... I'll have to try that!

Thanks to everyone who posted suggestions!

cogfilms
06-20-2005, 09:50 AM
Hey, I was wondering if there is a way to get an object to dissolve. This is different from transparency. The reason I'm trying to get this working is to swap out one object for another during animation. In Lightwave you can keyframe the object's dissolve so that one object will go from 0-100% dissolve while the replacement goes from 100-0% dissolve in one frame of animation. Any help would be appreciated!

P.S. keyframing the size of the object from 100%-0 while the replacement's size goes from 0-100% is not the solution I desire.

Thanks!

Hi oxygen_77,

Sorry it's taken me so long to find and repond to your question. My PC has been out of action for a few days due to overheating, rendering in Blender. I hope I'm not too late in providing a solution to your problem because you can use alpha masks to dissolve objects in Blender.

http://www.litster.nildram.co.uk/images/cog-revealed.jpg


I had the same problem as you over a year ago but friends on the Elysiun site resolved it for me. To avoid specularity appearing on what should be transparent areas of your object turn the slider of the SpecTransp setting, in the Mirror & Transp panel, to 0. Highlights will then not show on your alpha transparent areas of your model.

Here are 2 animated alpha disssolve concepts developed for my feature 'Cog', which demonstrate the effect.

cog revealed teaser (http://www.litster.nildram.co.uk/movies/cog-revealed-LG.mov)

Temporal portal (http://www.litster.nildram.co.uk/movies/temporal-06alg-Sorenson.mov)

Hope this answers your question.

Cog

oxygen_77
06-20-2005, 03:54 PM
Hi oxygen_77,

Sorry it's taken me so long to find and repond to your question. My PC has been out of action for a few days due to overheating, rendering in Blender. I hope I'm not too late in providing a solution to your problem because you can use alpha masks to dissolve objects in Blender.

http://www.litster.nildram.co.uk/images/cog-revealed.jpg


I had the same problem as you over a year ago but friends on the Elysiun site resolved it for me. To avoid specularity appearing on what should be transparent areas of your object turn the slider of the SpecTransp setting, in the Mirror & Transp panel, to 0. Highlights will then not show on your alpha transparent areas of your model.

Here are 2 animated alpha disssolve concepts developed for my feature 'Cog', which demonstrate the effect.

cog revealed teaser (http://www.litster.nildram.co.uk/movies/cog-revealed-LG.mov)

Temporal portal (http://www.litster.nildram.co.uk/movies/temporal-06alg-Sorenson.mov)

Hope this answers your question.

CogI've viewed your videos before but thanks for posting the info. about the SpecTransparency. That's probably going to work for most of the things I need. I guess if I needed to dissolve a glass object I would just IPO the specTrans as well as the alpha?

Thanks for the help!

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