How to achieve Overlay Blended textures for a 2d game?

Hi-

I'm trying to overlay a texture on top of everything for a 2d platform game I'm working on. In Flash, overlaying textures is dead easy, and you can achieve most kinds of Photoshop style Blend modes. In Unity though, I haven't been able to find out much about how to go about this, and then the answer seems to be custom shaders, which are beyond my current experience.

I've attached a few images- the first is an 'example scene'

Second is an 'overlay weave' texture, which I wish to overlay (combined 'multiply' and 'screen' blend) on top of the example scene image.

Third pic is a reference image which is the example scene combined with the overlayed texture on top, and represents the look I'm trying to achieve.

If anyone with this kind of proficiency has the time or would like to take a look at this or offer some advice it would be really helpful (even to say, 'yes, this is possible')- I'm very anxious to get this graphics problem sorted as the game depends on having a specific look. If this is impossible within Unity, I'll have to move on to another engine or solution,

Cheers (and looking forward to hearing from you),
S Tozer (WeaveDev)

stutozer@gmail.com

 

Thankyou Leo

I had already checked this thread, and came away confused by it. Referring specifically to this post..

http://forum.unity3d.com/threads/free-photoshop-blends.121661/#post-1117707

The author says it's not possible to simply overlay a texture over whatever's under it (background) unless you use a renderTexture, which "could" work.


then a few posts following-
http://forum.unity3d.com/threads/free-photoshop-blends.121661/#post-1118585

he says that to do this requires Unity Pro.

So to clarify, I'm not looking to blend two textures together, but the result of the whole scene with another texture overlayed on top of everything. But this doesn't sound straightforward, or guaranteed, and will cost me money just to see if it 'might' work. And it's still confusing for a beginner.

Since I haven't been able to come across the kind of thing I'm looking for, I'm assuming at this point that it's not trivial to do, and may not even work properly anyway. It would be great if someone could set me up with the most basic of sample scenes (they could use the graphics provided in the first post, or anything that gets the point across), which I could then take a look at- if indeed it's possible without spending money on Unity Pro.

Cheers and thanks for your reply,
Stu

 

Just to note, RenderTextures can be used with Unity 5 Personal Edition now.

 

make on object and assign a Material to it, choose one of the Particle Shaders as the Material's shader instead of Diffuse. eg -> Multiply or Additive and pick some textures, put the object in front of something else and it will look like Multiply or Additive layer blend.

 

Assuming you have a shader that performs the actual blend you want, why not just add a new camera, make sure it is rendered last, and it's view should contain only the blend texture (as cube or plane) with the blend shader.

That way, all other parts will be drawn, and then on top of that the texture will be blended per the shader.

Am I missing something?