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Strange lights effect under roof

Q

qqwertz

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ca-novascotia
Hi All,

I am encountering a strange effect, which I cannot explain. In one of my models (see screen shot), there is always an illuminated band on the wall under the roof. The roof is a solid 3D object and the faces extend towards the edge of the roof. There should be no light leaking through the roof, but it always looks like there was a crack in the roof right where it hits the wall. This artifact only occurs in MSFS, not in Blender. Did anyone else encounter this before? Or does someone have an idea what may cause this effect?

Thanks,
Peter

CYOH-wip3-PBR.png
 
If you zoom very close, you can clearly see the gap between the walls and roof, making the model more like a partitioned awning, than a box and if the interior is left transparent to conserve resources, then the upper part of the wall would almost certainly be exposed to a light source that is concealed from above by the (single sided) roof texture.

In the image below, I can see that the horizontal line of the eave, does not extend to the tip of the sloped gable, it actually appears as if you can see the termination of the horizontal roof eave on the surface of the gable fascia. If so, this is kind of an opposite scenario of an untextured interior, in that one might expect the underside of the eaves to be textured and the inside, underside of the roof to remain blank, however it is enough of an anomaly, that it bears inspection, in order to resolve the issue.

CYOH-close.png
 
Yes, i have the very same Problem

Edit. Ah now I understood (what i didn't understand in text at bottom of topic). There is a gap on his pic.

But mine doesn't have ome though. The roof is on the same vertice like the building itself on my model. I've copied the house faces and extruded the roof from that one. So it's basically the same mesh.


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MSFS Objects - Weird bright areas where it should be dark

Hello. Atm doing a small airfield and noticed that, when direct light is hitting the object, areas that should be darker are actually brighter instead. One can see it here very well and it looks bad imo. (ignore the missing ground...) As you can see, it looks really weird below the roof...
www.fsdeveloper.com www.fsdeveloper.com

Not sure if I understand everything said in the last post. So do you mean one has to model the roof with an inside texture?
 
Guys this bug is well known, it is also with P3D since the arrival of the shadow. It is in all the scenery and at the moment nobody knows how to deal with it (To my knowledge)
 
Hello RK and others,

thanks for your feedback. RK was right, my roof was floating a few mm above the building wall, but I changed that now and it didn't change the issue. @RK: you are a very good observer. The fact that the bottom of the roof did not fully extend to the edge was already fixed at the time of posting. The screen shot was 1-2 days old when I asked my question, but thanks for looking so closely into it. It appears that Cedrice could be right and this is a bug. The effect indeed depends on shadows, and on the angle of the light source.

Thanks all,
Peter
 
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