KeyShot Forum

Technical discussions => Animation => Topic started by: jet1990 on March 02, 2018, 04:07:28 am

Title: Keyshot 7 Video label map question
Post by: jet1990 on March 02, 2018, 04:07:28 am
Hi all,

I've been playing around with keyshots 7 and I'm loving it so far - especially the video label option.

my question is - If i had a video that had elements of transparency (think of a PNG without a background but as a video) , could i apply that to a glass panel and animate it or would it fill the background in with a colour?

thanks
Title: Re: Keyshot 7 Video label map question
Post by: Will Gibbons on March 06, 2018, 08:26:22 am
Hi all,

I've been playing around with keyshots 7 and I'm loving it so far - especially the video label option.

my question is - If i had a video that had elements of transparency (think of a PNG without a background but as a video) , could i apply that to a glass panel and animate it or would it fill the background in with a colour?

thanks

What video format do you have that supports transparency? As far as I'm aware there isn't one. That said, you can load an image sequence (say .png) with transparent backgrounds and they should behave as you wish.
Title: Re: Keyshot 7 Video label map question
Post by: mattjgerard on March 06, 2018, 08:41:16 am
Wills suggestion would work the best, as the formats that support transparency are kinda specialized and require codec packs installed. Off the top of my head those that would work would be Animation, ProRes4444+, DNXHD+, GoPro Cineform, and others that are basically images sequences packed with in a video file wrapper.
Title: Re: Keyshot 7 Video label map question
Post by: Robb63 on March 06, 2018, 12:48:31 pm
There is some format I've had to export for our Creative team that does include alpha channels, so that you can get a transparency in a video to overlay it.
It may be a mov (or mp4) format, that seems to be what they request most often. Somewhere inside the color settings for that file type (in After Effects) there is a pull down that tells the video format to include alpha.

Sorry I can't remember the specifics, but I'm not in my office at the moment.
Title: Re: Keyshot 7 Video label map question
Post by: mattjgerard on March 06, 2018, 01:49:31 pm
Its most likely a .mov file, that's an Apple format, and most likely an Animation file or some flavor of ProRes. MP4's don't support alphas as far as I know, but I'm not in neck deep in the video world anymore.
Title: Re: Keyshot 7 Video label map question
Post by: MWo on March 07, 2018, 09:24:24 am
I did some quick test.


First I created an animation with png frames and "alpha channel"
You'll find the test scene attached as "1 - INNEO Example - KeyShot 7.2 - create video with alpha channel.bip"


As second step I used the frames as video map and combined it with two nodes in the material graph to use the blue color of the spinning donut to the opacity channel with a color correction node.


See the details in the attached scenes.




Hope that helps


Cheers
Marco