Texture problem

[mickeal_alex]

Need help with a problem i ran into, so i generated a terrain at 2048x2048 started with the detail map and generated the height map, water map and so on till the texture map and i am pleased how it looks.Now i need to use the terrain are 8k resolution so i tried to resize the heightmap at 8192x8192 and the texture map looks like it applyed a single tileable texture over the entire terrain, on the previous 2k texture map i had peaks, rocks, ridges, sand and here i get the same texture tiled over the entire terrain. Does anyone know what am i doing wrong, is this a bug or something?

[Aaron]

Hi Michael_alex,

Welcome to the forum, and sorry for this inconvenience. Can you please post a screenshot of the two textures to show the differences between the 2k and 8k texture maps?

This sounds like an odd error; not something that's a known bug. If I had to guess, I'd say that that your resizing of the heightmap resulted in a huge horizontal scale, which therefore made the terrain very flat, and consequently caused the whole map to turn into grass with a single bland texture. Can you please tell me what the current horizontal scale of your map is? (you can get this number from the 'Operations->Heightfield->Change horizontal scale' menu option.) How precisely did you resize the heightmap from 2k to 8k?

Best regards,
Aaron.

[mickeal_alex]

First off thanks for the fast reply.
The horizontal scale is 10(same as 2k) and i thought that it may have flatten the terrain so i tried to increase the maximum from the height map vertical range but when i did that and regenerated it added islands in places where it didn't have. The reason i need the 8k is that i use this at work and i sent the 2k heightmap to the game designer to place all the props while i was regenerating the 8k and i only need the texture map at 8k rez because we can use the 2k heightmap generated previously.I tried alot of things i resized the heightmap from l3dt and i got what i said, i resized the heightmap from 2k to 8k in photoshop(saved as png and wrote the minimum and maximum vertical range), i also tried to resize the design map( i remember that as far as texture it worked only problem was i got too much erosion, the terrain looked more like swiss cheese full of holes).I also tryed to resize the heightmap from 2k to 4k and i see that i loose abit of the rock texture so increasing the resolution definatly removes height or it may be a bug.

http://imageshack.us/photo/my-images/88/8kterrain.jpg/

http://imageshack.us/photo/my-images/692/2kterraino.jpg/

[Edited to change huge inline images to links - Aaron]

[Aaron]

Hi Mickeal_Alex,

It could be that the vertical scaling was lost when the heightmap was re-imported after resizing in Photoshop.

Can I ask you what the altitude range values are for the two maps? To get these values, please select the 'Operations->Heightfield->Change vertical range' menu option. In the dialog box that opens, 2nd from bottom, is the 'Altitude range (m)' value.

Best regards,
Aaron.

[mickeal_alex]

I was able to generate the map at 8k resolution by resizing the detail map as i said earlier so there must be something with the heightmap resizing.
I wrote only the minimum and maximum values for the terrain and entered only those values for the 2k and 8k textures wich are: Minimum -373.46 Maximum 870
The Altitude range is 1244.

[mickeal_alex]

Found another problem so i made the map from the design map at 8k and all looks ok, i see the rocks on my terrain next i manually sculpted the heightmap and now i get the same problem only get grass texture and i only flatten some parts on the terrain.

[mickeal_alex]

I think i found the problem, the horizontal scale, when i set it to 2 i get back the rock texture.

[Aaron]

Hi Mickeal_Alex,

Of course! I apologise for not picking up on that earlier.

To maintain the same physical map size (and hence slope angles, etc.), you need to decrease the horizontal scale when you increase the number of pixels, and vice versa (size * scale = constant). Consequently, in your case the horizontal scale of the 8k heightfield should be set to 2.5m per pixel (not 2) to give you exactly the same slope as before the resize operation.

Following on from this problem, I will:

• Modify the 'Operations->Heightfield->Resize heightfield' menu option to re-calculate horizontal scale to maintain the same physical extent. For the current and all previous versions of L3DT, you had to remember to do this manually.
• Add a diagnostics script that users may run to create a digest of all relevant settings for all maps in the project, to aid in this sort of debugging.

Edit: The heightfield resizing option will now ask you if you want to keep the same physical size of the map (by changing the horizontal scale), as seen below.

ResizeHorizScaleQuery.png (33.15 KiB) Viewed 622 times

Best regards,
Aaron.