[FIXED] Strange black streaks on map (Newcrest)

@sunddee4  As best as I can tell from your pictures, this appears to be coming from just one of the houses which leads me to believe that there is something off about that particular house and probably shouldn't be used.  But to be sure can you give a little more information.  

1st, does it happen with any house you place from your library or just that one.  From the 1st picture, it looks like you've placed that house with the turret multiple times and most places you've put it, you've got the lines.  In the other pictures, it looks like you've replaced it with other houses and it appears that the lines have gone away.  It that correct?

2nd, is it a downloaded lot or did you create it yourself?  Some creators do use cc and don't or simply forget to mention it so weird things do happen when you don't happen to have the cc used.  If you made it yourself with or without cc yourself, there is no guarantee that it work right every time.  I've got a lot I built from scratch with no cc in a previous save that I imported into my current save and for some reason, it just keeps crashing after a few minutes of play and I have yet to figure out why.  No other lot I've built has ever done that.  Sometimes, it just happens.

3nd, does the house have any cc in it.  From the shape of the black lines, it looks to me like it could be the outline of the outside trim and in all the places I can see it, it looks to be the same shape.  I've never seen any cc outside trim but I've never really looked for it so I don't even know if it exists anywhere or is even possible.  It could also be terrain paint.  There's another post either here in AHQ or on the forums that had a problem where terrain paint moved when the house was placed but it only showed at the lot, not on the map.  Sometimes putting a downloaded lot with cc in it that you don't have will do some strange things. 

And lastly, have you tried bulldozing that house and replacing it with another different house to see if the lines go away?  It looks like you have in some places and the lines went away.

@CGrant56  Thank you for taking the time to look at my problem and thank you for your reply! 

1.  It happens with any house I place from the library. Yes, on the first picture it happened with the same house with the turret, but if you look at the build in the upper left corner of the same picture, you can see it happens with a different build as well. Just on the right side of that upper left lot you can see a very vague black spot + stripe and it has a different shape than the other black streaking from the other build. The strange thing is that right next to it, I placed the same build and it didn't cause a black spot + stripe. This build and the house with the turret are both houses I  built from scratch. Previously, the house with the turret didn't cause any problems.

The three pictures are all from three different saves, because I wanted to test the problem. The first two are new saves and the third one's a save I had since may/june. I did 'replace' (i used other builds in a different save, not really replace the same builds in the same save) the houses in a different save but only some of the black streaking happened, so yes, partly correct (to answer your question if the black lines have gone away). For example on the third picture in the lower right corner, I placed a very different house (the brown house) from my library. This is a house I downloaded from the gallery from another user and renovated to my liking. I uploaded my renovated version to the library and placed it on the lot in the lower right corner. This house caused very different black streaking with a different shape than the build in the first picture. So with that house the black lines didn't go away. Sorry for the confusion, they're different saves.

2. Short version: it happens with both my own creations and downloads from the gallery. No CC. Longer version: The builds on the pictures that caused the black lines were my own creations.  But on the third picture a downloaded lot that I renovated caused the lines (see previous answer). I didn't use any CC with these builds. The downloaded build  didn't have CC, because I only download builds with objects from the game itself. Just an explanation of what happened in the third picture as an example: in the third picture on the lot in in the lower right corner (the brown house) I placed a blue downloaded build (basegame) from the gallery with no CC. There were no black lines, everything was fine.

I made copies of this save and tried 3 things. First I tried to replace that blue downloaded build with a MAXIS build from the gallery (the red house from parenthood), and it caused black lines. Using a copy of the save, I placed my own creation and it had black lines. In another copy I placed a downloaded build that I renovated (the brown house) and it had black lines as well. They all had the same black lines with the same shape so maybe it was caused by the first downloaded blue house? The weird thing is that in other saves that blue house doesn't cause problems. The downloaded blue build is a basegame house and as far as I know (there's a building video) the builder didn't use CC cause none of their builds have had CC and this was a house that could be used by "everyone" because you only need base game and no extra stuff.  

I must say that at one time I had build CC in my mod folder, but I didn't use them with any of these builds and saves. At the moment I don't have CC/mods, but I both tested this bug when I had CAS CC and a script mod in my mod folder and when I had no CC/mods at all.   
Could it be that I should clear certain folders in my Sims 4 folder because it could corrupt the game with leftover cc/mod/ traces? I already always delete the localthumbcache.package and have deleted files in the cache folder, but maybe theres more? I've also repaired the game. 
Wow that would really suck if 'sometimes, it just happens'. I get so frustrated because of this bug because I'm always scared to place lots in my saves, in case one of the lot causes black lines and ruins the whole save for me ☹️ Especially when working on a base save file, all that work for nothing...Especially because it happens randomly and not always. A build doesn't always cause black lines, just 50% of the time and it doesn't matter which build or lot it is. 

3. The house never had CC in it. And I never downloaded outside trim CC ( I had to look it up lol, does it even exist?)

And to answer your last question: Yes I've tried to bulldoze the lot in build mode, but the black lines stay. Also bulldozing and after that placing a different build from the library or building from scratch on the bulldozed lot doesn't make the lines go away. See my attached picture.
Sorry if I was a bit unclear in my start post, the pictures are all from different saves. When the black lines appear in a save, they never go away and the save will always be ruined in that way...

If I was unclear about something or used too many words (I like to be thorough) and it became unclear, please say so! 

@crinrict 
Thank you for your reply!

I'll give you a link to one of the houses that caused problems after I tried to replace it with a MAXIS build (see point 2 in my previous answer). It's the downloaded blue basegame build I mentioned. Placing the house on a specific lot (in the lower right corner), nothing happened at first, as I mentioned in my previous answer (point 2). But replacing it with multiple different builds created the same black lines in the same shape, so maybe it is connected to the downloaded blue basegame build...because the shape of the black lines don't change. I replaced it both in buildmode and through map view. It had the same outcome.

https://www.ea.com/nl-nl/games/the-sims/the-sims-4/pc/gallery/9619C6AF144511E98E0EB573E4FD424D?category=all&searchtype=ea_origin_id&sortby=newest&time=all&searchquery=simlicy&max=50&maxis=false

Creator: simlicy
Lot: Base Game Victorian

I can link you to one of my own builds that caused black lines as soon as I placed them, I don't know if that would be better than the above house?
But I'm gonna have to do that later today or tomorrow as my sims 4 game is on a different pc and I can't access it right now.

@crinrict  I'm sorry but what do you mean with scrambles?

@sunddee4 The bushes (not sure about the correct english term, that's what my translator gave me :D)

I'm not 100% sure I got the right EA house though. The one you describe as blue house. I thought it might be Pigue Hearth but maybe it's something different ?

@sunddee4  Thank you for the extra information.  From what you said, I don't think it's the houses themselves or cc.  I've never seen anything like it before.  So a few more questions.

Have you tried repairing the game since this started?

Can you see the black lines when you're in live mode on the lot itself playing or is it just on the map?  

Does it happen in any other worlds or just Newcrest?

Are you running the game on a laptop or desktop and has anything changed with your hardware (like a new video card)?  There have been a number of graphics issues with graphics on laptops.

Have you changed your graphics settings recently?  And have you tried changing your graphics settings to see if it would go away?

To be honest, I'm sort of grasping at straws now on what it could be.  Since it isn't a bad download or a cc issue, I'm sort of leaning towards a graphics/rendering issue.  But if only happens in Newcrest, it's probably not that either.  If you've repaired the game, it's probably not a bad file.  I've seen a number of posts on graphics/rendering issue on laptops and with some on specific video cards but if you've changed nothing hardwarewise and only installed packs and the patches, I just don't know.  

@crinrict  bushes is the correct term in the US.  Scrambles threw me for a loop too until I looked it up and found that it's a UK term that means the same thing like the bonnet of an automobile is called a hood in the US so I guess your translator uses UK English terminology.  <grin>

@crinrict  Hi sorry for the late reply. I was sick and then busy and couldnt play the game. To answer your question: I downloaded that basegame house with the bushes (scrambles) included, so someone else placed them there. I only downloaded the build and the game automatically placed the lot in that way. I didn't change anything about it. Right now im testing the game and going to answer all the questions! Hope that will shed more light onto this issue.