Irrlicht Engine

Hello guys ))
I need help )

Here is what i want.
1. I got a geometry with 2 TCoords layers and 3 textures.
2. The 1 layer of tcoords is for the solid diffuse maps.
3. The second layer has a texture with alpha channel.
The reason for 2tcoords is that diffuse maps are heavily tiled, but the opacity map is not....

Here is what i want -
Extract Opacity from diffuse 1 and then blend the result onto the diffuse 2

How can i setup a node to render such a composition?
None of the Material types can provide this i fear.....
Please do not offer shaders. i want to make this on Irr only in 1 render pass

P.S. I',m not sure I've explained it correctly....

Irrlicht doesn't have any material that fits what you ask for, so either you do it with shaders, or you add an extra material on your own.

You could have a material with a white texture with the alpha channel on the first layer, and then, use the diffuse texture in the second layer, which blended with the first layer using a lightmapping material.

But the problem is that there isn't any lightmapping material which also supports alpha transparency.

The easiest solution is to use shaders. You only need one texture with the alpha channel, and another with the diffuse. Read both, and output a pixel with the RGB values of the diffuse texture, and the alpha value of the alpha channel. And that can be done in a single pass. Shaders render in a single pass, unless you use CG.