Animating Transparency?

[MaggleMitch]

I was just wondering if it's possible to have keyed transparency exported from Maya so I can fade elements in and out etc.

[ziriax]

Unfortunately the glTF spec doesn't support transparency animation :-(

[MaggleMitch]

Damn - no worries. Does the same go for ‘visibility’ too? I haven’t been able to get that to work so have tried to mimic that by setting scale to 0 but it doesn’t always translate well. That’s how I planned to do sprite sheet animation

[MaggleMitch]

I've sorted this - found this issue (from here: #152) and have gotten the scale working fine by making the keys stepped and throwing "-detectStepAnimations 2" in the extra flags box. Thanks!

[ziriax]

`-dsa 2` should work in such a case, it was designed for it. If not, you might have found a bug

…

On Tue, 27 Jul 2021, 22:16 MaggleMitch, ***@***.***> wrote: I think I've found my issue is with when mimicing the visibility by one frame having the object at 1,1,1 scale and the next 0,0,0 - you can sometimes see the transition in the output which gives a jumpy feel. I've tried to make these specific keys stepped (from here: #152 <#152>) but it doesnt seem to be exporting like that. Was there a specific way I could make these keys stepped? — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#165 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AASHK35NUUUW7KZMKQPKTD3TZ4HZDANCNFSM5BBL3MMA> .

[MaggleMitch]

Is there a way to get image sequence texture keys coming through? Or would you basically need to do the above method on a number of different objects to mimic the image sequence rather than on one object?

[ziriax]

Unfortunately glTF 2.0 doesn't support texture animation.

https://stackoverflow.com/questions/55806088/gltf-2-0-video-texture-support

It seems your scene requires a more advanced format?

glTF is really simple; you might want to look at e.g. USD, but I have no experience with that.

It is indeed unfortunate that glTF doesn't support "animate everything" like Maya does. That would require a dataflow aka dependency graph, like Maya.