How to animate transparency along a gradient.
by Dave sia on Aug 12, 2015 at 10:05:16 am
I have a project, I need to animate the transparency of a layer using a rendered grey scale image.
So I need to have the "lighter greys" transparent and then crawling to the "darker greys" finally only the "blacks" will be transparent. better if i can control this grey selection sliding effect.
Its kind of like animated clamp on a grey scale image.
I am not sure if I described it correctly.
Re: How to animate transparency along a gradient. by Dave sia on Aug 13, 2015 at 2:28:02 am
Thanks Kalle for the fast response.
I also need to animate the transparency in a rather controlled way.
Example: I need to have the greys RGB 160 to 165 to be visible (to make the bottom layer transparent) then it crawls to 165-170 then 180-185, increasing or decreasing in value -but with a constant clamp maybe 5 to 10 range.
I need the visibility (narrow section)to slide/animate along the grey scale image provided.
Similar to gradient wipe but only a narrow middle section to be visible.
Re: How to animate transparency along a gradient. by Kalle Kannisto on Aug 13, 2015 at 7:38:13 am
There may be an easier solution, but the first that comes to mind:
Make a copy of your transparency mask and use animated Levels on one of the layers to set the bottom cutoff and on the other one to set the top cutoff, then invert the top and compose with Minimum blend mode. You'll have to precompose the two layers together to get it to work as a Track Matte.