Tiling, covering up?

knak47

I am sure there are many ways to accomplish this I am just wondering what are some different approaches.

So basically what I want to do is break up the tiling of my floor panel texture by overlaying some basic black or brown dirt or grime. The thing is I want the dirt layer to be scaled much larger so it doesnt look like it is repeating just like the floor tiles.

If brushes can have Deco Layers painted on them maybe that would work?

Ben Apuna

If you're using static meshes for your floor then you could use some vertex color/texture blending techniques. Like in this tutorial by Virtuosic, as discussed in The Snow and Ice of Uncharted2? thread with a material like this by shadows. Here's a project Virtuosic is working on using similar techniques.

On the other hand if you are using BSP then I think you are stuck with decals.

EDIT:

Here another way to do texture blending using a "mixmap" by Lamont.

cholden

decals everywhere

knak47

Yeah im using BSP, so decals it is i guess. But Im going to check out those tutorials for the static mesh approach right now, thanks.

Dan!

you can Lerp two textures together with a mask(something like a cloud or whatever). That mask can have a texture coord linked to it to increase/decrease the scale of the mask.
also decals

divi

http://www.chrisalbeluhn.com/UT3_Add_variation_to_repeating_textures_Tutorial.html

Oniram

are decals expensive to render? im wondering because of all of the alpha information, it may take up a lot of resources for lighting.

knak47

How do I get decals to show up that will react to light but not be transparent? I am making a Decal material. I followed Hourences tutorial ( http://www.hourences.com/tutorials-ue3-decals/ ) which is great and it works and reacts to my scene lighting but I don't want my decal transparent. So Then I followed the tut on UDK central ( http://udkc.info/index.php?title=Tutorials:Decals ). Either its transparent or just shows up black. Here are some screen shots. the first two are the transparent setup and in game view. The third and forth is the setup where it shows up black. Please help this is driving me insane!

knak47

Ben Apuna wrote: »

If you're using static meshes for your floor then you could use some vertex color/texture blending techniques.

So beside the little hiccup with Decals, I am also having a little issue with Mesh Painting as well. I got the Material set up and it works pretty well but there is a slight issue. The texture I have plugged into input B on my Lerp remains in some areas, its definitely being caused by the cloud texture I have but I don't know at what point or how to get rid of it. Even when I paint over it with other colors it still remains in a few spots, I can move where it shows up by adjusting the constant connected to the Rotate Node but cant paint over it all together. Here are some screen shots, the first one Is the tessellated mesh painted fully white/100% red, and the purple shows up fine of coarse. The second shot with RGB view mode on in the Mesh Paint options clearly shows that I painted over the left side with black which should cover up the purple with yellow. And in the third image you can see where the purple is being left behind.

Thanks again Polycount, maybe one day with the knowledge I get from you guys I might actually be able to answer a question:\

Ben Apuna

Might be you're multiplying one of the clouds texture samples by 4 and the inverse of that by 2 and then adding the vertex colors one more time to that result, just a guess though.

EDIT:

The more I think about it, just change the "Add" above the "Constant 20" to a Multiply, that way the vertex colors act as a mask.

Mathematically anything multiplied by 0 is 0, so a 0 value red channel vertex color multiplied by your clouds and vertex color combination will still end up with 0 where vertex color red channel is 0.

I not sure why you have the Power 20 and Constant Clamp anyway, it seems to just be making your material needlessly complex.

knak47

Ben Apuna wrote: »

I not sure why you have the Power 20 and Constant Clamp anyway, it seems to just be making your material needlessly complex.

Thanks Apuna I'll give that a try when I get home.

As far as the Power 20 and the Constant Clamp, I just followed the Tut for Vertex Painting on UDK Central (http://udkc.info/index.php?title=Tutorials:Vertex_Color_Blending) and apparently this step is to "tighten the transition between the two vertex colors" I havent double checked if it is really necessary. But I will give that a whirl as well when I get in tonight.

knak47

Fixed my decal not receiving lighting, I deleted the lights in my scene then recreated them (one dominant point light and one regular point light) Once I did that everything was fine for some reason the dominant point light that I had before wasnt effecting the Decal.