[SOLVED] Strange Terrain Issues from Imported Heightmap

[larry.ellis]

Hello everyone,

 

I'm in the very early stages of testing out the engine, and im trying to import an 8192 (8193) heightmap, but i'm getting some very strange glitches that look as if sections of the terrain are being repeated and also many of the terrain vertices are stretched very high and very low.

 

My process is to create > object >  terrain

 

Then choose import tab with the following settings: 

 

Overall Size: 8193

Max Height: this varies as i'm still trying to get the height correct

LOD distance: 100

Flip Y: Yes

 

The file format has been lots of different types, raw, tga, pgm, png, psd, but they all produce the same results. 

 

The highest altitude in the map is 1024, but when setting the height to that, its way too low. I can't seem to figure out a good value to match.

 

I'm using the Alpha Engine 2.0 preview r508 in DX11.

 

[silent]

Hi Larry,

 

Could you please send us your heights texture? 

 

Thanks!

[larry.ellis]

Hi, thanks for the very speedy reply!

 

What format? I'm using all kinds of formats and they are a bit large to send (220mb).

 

I've tried files exported from both World Machine and CryEngine and i get the same results.

 

It doesn't matter what format, the glitch still happens.

 

Should i try the older version of the engine?

[silent]

Hi Larry,

 

If results are the same for all formats, could you please send us png image?

 

Also, what image format are you using? R32F should be just fine for the heightmap.

 

Thanks!

[larry.ellis]

Silly question, but how do i send you the file?

[silent]

Sorry, my bad.

 

You can use any file hosting (for example, dropbox), or upload file directly to our FTP server:

1. ftp://files.unigine.com
2. login: upload
3. password: uSh3aihu0ja5

Thanks!

[larry.ellis]

I've made a tiny step of progress, the stretched vertices glitch is gone, I simply saved and then re-opened.

 

But now the terrain has some splits in it, dividing the middle up into four chunks.

The four chunks are made up of two different sections of the heightmap, both are repeated and mirrored, and are also different heights.

 

This was using PGM format.

 

I can't share the heightmap publicly, can i upload to dropbox and PM you the link?

Another silly question, how do you PM on this forum?

 

[silent]

Hi,

 

Please, move mouse cursor to my nickname and wait for a sec for pop-up menu. After that you can click on Send Message button.

 

Thanks!

[larry.ellis]

Thanks.

 

Pm'd  the link.

 

Bed time for me, i'll check back in the morning.

 

Cheers.

[silent]

Hi,

 

Sorry, but it seems that we can't reproduce this issue. I've used following settings:

1. 8193x8193;
2. Height: 1200 / 5000 / 10000;
3. LOD: 100;
4. Flip Y: yes;

And I get following results:

 

 

No artifcats at all.

 

Could you please try to create new terrain from scratch in empty world and check again?

 

Thanks!

[larry.ellis]

Okay, I deleted my old project directory and started fresh. Created a new terrain object and imported the PGM and it looks perfect.

 

I have no idea what the cause was, but its fixed so i can move on.

 

Thanks heaps for your help Silent!