Smooth wall transition?

[TransDevv (transportdeveloper3)]

I’m not sure if this is possible on roblox, but I want to achieve the effect of a wall smoothly changing from one texture to another.

Here are the walls I have.

And here is the effect I want to achieve with the walls. (I used a gui gradient)

Does anyone have any ideas how to achieve this with 2 walls
Note.
1 Wall is a texture and the other wall is a material variant.

[WoTrox]

Well, you can create 2 images of the 2 walls, and use an image editor like paint to blend them together. Then cut it in half and export it as 2 images, and use them as a decal on those 2 parts.