it's something broken on my laptop, please, how to fix it?

[stastver]

https://imageup.ru/img215/4453918/snimok-ekrana-2023-07-30-005513.png.html

[stastver]

Windows 11 (22H2), AMD Ryzen 5 5500U with Radeon Graphics, Sweet Home 3D 7.1, Java 1.8.0_202-32bit, Java 3D 1.5.2

[hansmex]

The black lines can be a ceiling/roof gone wrong. If not all walls of a room are of equal height, SH3D can produce triangles instead.

Make the roof invisible and see if these lines disappear. If you need a roof/ceiling, make all walls the same height, or make several rooms to avoid the problem.

H

[sjb007]

Have you read through this ?

There are known issues with recent AMD drivers causing 3D View corruption. Maybe try downgrading to the last known good version of the drivers?

[stastver]

it's not the roof, it's furniture from the library! Nobody know how to fix it with AMD drivers!

[stastver]

Thanks to all! Update AMD drivers and get working enviroment!