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Hello, guys.

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I'm here to address one of the issues students text me about.

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It's parallax background.

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So student says when player runs ahead, the pull up the parallax background waves or flicks.

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I don't know why.

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Maybe camera ratios.

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I share the video and actually I didn't need to watch the video because I know what he's talking about.

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I faced the issue myself long time ago when I was recording this course for the first time, and I was

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afraid I will not find the solution and I cannot release a course with such a bug.

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But actually it's very easy to fix and solution is simple.

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And the reason it's happening is also very simple.

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It's very simple to understand.

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First, I want to show you.

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What he what he means.

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Let's see.

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And the video is very lucky.

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But still we can see the background flicks a bit shakes like that.

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And I have same on my project just a bit, especially if I go to Player's rigid body and change it from

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interpolate to none.

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You can see here.

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Where of my background?

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Over there.

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Right.

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So that's what they're talking about.

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Another student texted me with the same issue a while ago, and that's when I decided I need to make

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a video about it for sure.

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So it says he's in the background section and he's stuck because he cannot find the solution even when

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he uses different parallax code on YouTube.

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His further background tilts jiggles, shakes when he moves.

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So first of all, I'll show you a quick solution If you just want to know how to fix it.

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You don't want to know why it's happening.

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And actually, I showed the solution in my videos.

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It's very basically the same.

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But maybe it didn't help you.

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And I'll try to explain one more time.

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First of all, you need to set your rigid by this to interpolate.

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Interpolate.

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This is important.

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This is very important to do this.

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Second, you go to your main camera fine tuning machine brain change update method to smart update and

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blend method to later update.

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If it doesn't help you try to play with this, try to set up late update and late update here and just

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click these two couple of times.

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Maybe something will work better for you, but this what basically should be to make it work, I'm pretty

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sure.

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And.

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Even after you do this, you still may experience some deterrent effect, but it's going to be there

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only in unity.

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Ed Even in my videos later in the course when we setting up the canvas before we do the skybox, there

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is still some jittering of the mountains in the background and it is because of the unity.

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Only if you click over here to the stats, you can see your performance, space and CPU.

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And for some reason, I don't know if it's going to be there now, but sometimes for some reason when

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you move your mouse, unity has low performance issues and now it's jitter in the glitching.

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If I check my mouse, you can see my f-pace getting slightly lower.

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Not so much, but still it is there lower than it should be.

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And you can see MZ over here, the delay, it's getting up to six and seven.

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Again, it's not a big difference, but it's enough to make it lag on the background and if you thump

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the play mode and if you build your game, I'll go find, build and run.

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Look, when I build my game, I click top to start.

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I have no jittering on the background.

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It's all fine.

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You see, there is no lags, nothing.

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It works smoothly and nicely, basically perfect zero issues.

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So this is happening because.

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Mostly because of the unity ed and its own performance issue.

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So do, as I said, set up your rigid bodies to interpolate.

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Does that be a blend method on the cinema machine brain and make sure you have movement done in the

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update function.

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I'll show you what I mean by that.

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If you go to background Parallax on our script here, you can see it's done in the update.

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Player movement.

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Then in the update.

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Everything done in the update now smoothly, I'm going to transfer to explaining why this happening

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at all in the first place.

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You can actually ask this question in Google, and that's how I found the solution long time ago, like

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more than a year ago.

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But now it has like more short answer to the issue.

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So they basically discussed in same problem here determine problems with my camera.

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When doing a 2D parallax effect.

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I will leave link to this thread in the description.

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You can also find it in Google just by typing jittering background unity.

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There are lots of links discussed in this issue.

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Basically what they say is make sure you move in all objects, either in the fixed update or update.

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Don't mix them or you'll have endless headache.

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Then they discuss in some particular issue.

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And then Gregory from Unity Technology says since rendering is done on the update, late update clock

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same what we did here in the machine brain if you remember.

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Yeah.

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It's preferable to move all objects on the clock in order to reduce analyzing if you can.

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A good solution is to enable interpolate on rigid bodies.

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This will interpolate the transform physics between frames so that the position are appropriate for

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the current render time.

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Then you can run all your cameras in the late update and there will be no jitter.

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And that's what basically we did.

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If you remember, in the beginning of the course, I explained that there is a different type of update,

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fixed update, update and late update.

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So what he's saying basically is you need to decide how you're going to move your objects in the fixed

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update or late update and make sure you do it same across all of the objects in the game.

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And we chose update for that fixed update called 50 times per second by default.

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You can set up that in the edit project settings.

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Find the time over here.

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This is fixed time step.

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This one means it's called 50 times per second.

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If you want to make it called like five times per second, you can just increase the value and update

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can be called according to your face.

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If my space is 140, I'm going to be called 140 times per second.

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So yeah, I hope I explained why this is happening.

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It may happen because your objects moving in a different update or because you did not set a rigid body

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to interpolate.

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Make sure you do that.

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Make sure you set up your cinema machine.

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And even if it's happening after you did all of that, just make a build and see if it's still happening.

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If it's not happening when you build a game, then it's fine.

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You just work in unity, ignore it, and when your game is done, it won't be there.

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All right.

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Thank you for your attention.

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It was a lot of talking, none of nothing of coding, basically.

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But I see some people are getting confused.

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So I tried to cover the question here.

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I try to cover the issue.

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Check out the other courses.

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I'm releasing RPG course very soon.

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I hope you'll like that.

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It's going to be cool with the craft system and skill tree enemies Combat axe.

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So many cool stuff.

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So you.