Doors alpha transparency not working

[Cyber52]

Describe the bug
It depends on the camera angle - sometimes I can see through the door window but sometimes I can see a blue space and nothing more.

To reproduce
Create object with model ID 3089

Expected behaviour
It should always draw the proper view outside the window.

Screenshots

GOOD:

BAD:

Version
Client Multi Theft Auto v1.5.8-release-20698 / Windows 10
Server 1.5.8 / Windows 10

Additional context
I know there is an alphaTransparency argument in engineReplaceModel() function and It probably could do the job if it would be the replaced model (?)

[PlatinMTA]

This happens with a lot of objects that have transparency, as it's demonstrated in the photos provided by cyber52

[Fernando-A-Rocha]

Yes, happens a lot

[Haxardous]

this happens because the model doesn't have a transparency flag

[PlatinMTA]

Maybe we could introduce a way to change the transparency flag without reemplacing the model? Or we can do that already?