How can i get rid of these lines in my scene

Unity Engine
1

My scene is not clear, why it is showing these lines ?
How can i get rid of these ?

2

bump

3

Are you talking about the magenta line on the bottom right or about the visible color steps on the ceiling?

4

That’s usually what you see when you are rendering in 16-bit mode. (Oh, didn’t notice the magenta line, assume that’s something being rendered.)

5

i am talking about those visible color steps

6

bump

7

bump

8

Overcompressed images without proper dithering usually end up like that. Try a different type of compression on the textures, or apply some Floyd-Steinberg dithering while reducing the colours in some fancy image editing tool. When a gradient goes from 256 greys to 16 greys, for instance, it’ll end up looking icky like that. Dithering can smooth it over.

9

from where do i change what ?

lightmap images ? by selecting standalones ?
or every image texture in my project ?

10

Try different compression formats. If it’s mobile, you typically have RGBA4444 and RGBA2222 formats, but I don’t know if they’re choices in Unity. It’s best to prepare the textures in an image editing tool.

11

Is the ceiling just a color material or did you use a texture image?
If it’s just a color material you may try the following (not sure if it works but maybe it’s worth a try):
Create an image texture with this color and add some noise (5-7) in photoshop to it. Maybe this makes the steps less visible.

(We used this technique to create smoother gradients on print outs). I attached an example image with a gradient from black to white converted to 16 colors (middle) and add noise (10 in this case) before convert it to 16 colors). As I said, I’m not sure if it helps with the light problem, too.

1862678--119496--gradient_example.png

12

in my other project this problem is not there with the same room, problem is when i am made it an asset and imported it in my project and yes it has no texture, no color

The problem is only in this project, in other projects if i run the same thing, it works fine

check here
https://www.dropbox.com/s/7mhu5b5p48ia2wc/Screenshot 2014-11-26 10.18.04.png?dl=0

This above project has Direct3D 11* selected,

now if i do the same in my project, i get everything so so bright, for reference see below image -

13

Have you tried keeping the light a bit closer to the ceiling?
in some cases if the light is a bit far to the ceiling, then we may get these kind of issues after lightmapping.