Blurry lines between further away tiles

barakatx2 · Post by **barakatx2** » Tue Sep 21, 2010 9:33 pm

I am making a class that generates scene nodes from a 3D array to make map out of cubes like in the screenshot. The problem is the further tiles have blurry lines between them. Anyone know why this would happen?

Lonesome Ducky · Post by **Lonesome Ducky** » Tue Sep 21, 2010 11:19 pm

Are your different tile textures all in one texture? If so, mip mapping tends to blend the colors of the tiles together, leading to things like this.

barakatx2 · Post by **barakatx2** » Wed Sep 22, 2010 12:06 am

In this screenshot they are all using the same texture. Can I turn off the blending?

slavik262 · Post by **slavik262** » Wed Sep 22, 2010 12:47 am

Have you tried clamping the UV coordinates?

barakatx2 · Post by **barakatx2** » Wed Sep 22, 2010 2:39 am

Is that done like this?

Code: Select all

node->getMaterial(0).TextureLayer[0].TextureWrapU = video::ETC_CLAMP;
node->getMaterial(0).TextureLayer[0].TextureWrapV = video::ETC_CLAMP;

I tried all three clamp types. It didn't change anything. (Thanks for all the help so far though!)

slavik262 · Post by **slavik262** » Wed Sep 22, 2010 4:52 am

Yes, that would be how it's done. Besides that, I don't know what the issue could be. Sorry... if I think of anything I'll let you know.

Lonesome Ducky · Post by **Lonesome Ducky** » Wed Sep 22, 2010 5:55 am

Clamping only avoids wrapping on the edges, this is due to blurring within the texture itself for mipmaps. Pretty much your choices are to use separate textures, or have the tiles use a smaller portion of their part of the texture so blending doesn't effect it.

barakatx2 · Post by **barakatx2** » Wed Sep 22, 2010 9:02 pm

Wouldn't turning off mimmaps like this

driver->setTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS, false);

fix the problem then? I called that before I create the textures and it didn't change anything :/

EDIT: nevermind, I turned off the flag from the start of the generate terrain code and turned it back on at the end and it worked. there are no more blurry lines! is this supposed to affect performance? thank you for the help

Lonesome Ducky · Post by **Lonesome Ducky** » Wed Sep 22, 2010 10:12 pm

It increases the fill time a lot for distant triangles, because it samples pixels that are pointless for an object so far away. But if it's working for you and there's no noticeable decrease in speed, it should be ok.

onlinebingo · Post by **onlinebingo** » Tue Sep 28, 2010 3:05 pm

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