Synchro Transparancy in Appearance Profile Problem

[Tim4DConstruct]

So in this project there is a building that appears after a while. It is red with a transparency of 25. The end appearance is set to original color. So no more transparency. I will show this in screenshots.

When I load this in UE and play the schedule. Even the original colors stay transparent which is not supposed to happen. I don't know if this is know yet but I thought I'd post here just in case. Now we solved this for now by just putting transparency of the red appearance profile color to 0, and it will appear normally at end appearance in UE.

This is what it looks like in Synchro with transparency:

This is what it looks like at the end of Appearance:

This is what it looks like in UE with the red profile:

And here in UE at the end of the appearance profile. Still transparent.

And here 2 screenshots with transparency on 0 in UE.

Also the option to start transparency and finish transparency doesn't work it just stays transparent at 25%.

[GhisBntly]

Hi Tim, is the task's finish date equal to the whole schedule's finish date?
I am aware of rounding issues in this case which could lead to this bug, but it would not explain that the start transparency does not work either.
I will have to try and reproduce in my test project, I will let you know if I need access to your project.

[GhisBntly]

Hi Tim, sorry for the long wait,
I think I have reproduced these issues in my test project and, as I suspected, I think it only happens at the start of a task when it matches the start of the whole schedule, and the end of tasks when it matches the end of the schedule.
So I think I have enough information to fix those bugs for the next release.

[GhisBntly]

Hi @Tim4DConstruct ,
I am no longer sure I actually reproduced the problems you reported: I still have a similar problem today but only in our own application, not in the plugin. The problem is related to the schedule timeline slider not going fully to the precise end of the schedule: the precision must be less than one second, otherwise the end state of the tasks ending exactly at the end of the schedule will not be applied.
In the plugin, when I use "Play" or "Jump to end", I have no problem with these kind of tasks.

So in the end, would it be possible to share your project with me?

I am also a bit worried by the screen capture where you show the building no longer red but still transparent: I think the translucency may be down to 0%, but Unreal Engine may be confused by the amount of faces using translucent materials, which is always a difficult situation in 3D engines :-/ The obvious strategy would be to swap translucent materials for opaque ones once the task has ended, but this would mean a lot of material juggling and a lower efficiency of the 3D Tiles mesh merging optimizations...

Thanks in advance for your feedback,

[GhisBntly]

@Tim4DConstruct , if you still have the project, could you test it with the latest 0.1.22 release?
The problems here could very well be related to the wrong appearance profiles sometimes being used when setting the time to the exact start or end of tasks.

Also, if the captures were taken in UE 5.3, note that Unreal's rendering of transparency can be greatly improved in UE 5.5 by using "order-independent transparency": add this setting in your project's Config/DefaultEngine.ini, in section [SystemSettings]:

r.OIT.SortedPixels=True

While not new to UE 5.5, this mode was leading to frequent crashes in UE 5.3 when running 4D animations, so it was not usable.