Levelling out lighting of seamless texture

serpent

Hey all,

I am trying to create a 512x512 seamless texture for terrain in unity3D

The seamless part is non issue, right now I am having trouble with lighting of the texture before I begin.

So here is the photo that I have just tiled before I begin editing



You can see the top left is darker than the bottom right, and I am unsure how to "Level" out the lighting of photo

I am using Photoshop CS6, if anyone can help out or link me to a tutorial it would be appreciated

Eric Chadwick

I just did this the other day for a wood texture.

Here's one method:
http://wiki.polycount.com/wiki/ValueCorrection

I needed to preserve the existing contrast, so I couldn't use High Pass like that tutorial. So I went into Quick Mask mode, and used the Gradient tool to make a selection that fades in towards the too-bright corner (red everywhere else). I used that selection as a Layer Mask for a Curves adjustment layer. I'll see if I can dig up a tutorial that covers this.

Also it helps to use a tile previewer, so you can quickly see if your changes are going in the right direction
http://wiki.polycount.com/wiki/Tools#Tiled_Texture_Tools

Eric Chadwick

I put some more tiling tutorials here
http://wiki.polycount.com/wiki/Tiling

serpent

Thanks so much for the reply, that's exactly what I needed to do.

I was also PM'd in regards to this and the link they sent was relevant to this also

http://www.neilblevins.com/cg_education/brightness_var_tileable_texture/brightness_var_tileable_texture.htm

Thanks again!

Eric Chadwick

Added it to the wiki, thanks for sharing this!

<rant>
It's a shame someone sent that in a PM instead of posting here on the forum, where others could have seen it too. Threads like this come up in searches, so future eyes will see it too. That's why I always try to answer tech questions on the forum instead of via PMs.
</rant>