How to set global texture for all materials

Development Rendering
1

In Unity we have this: Unity - Scripting API: Shader.SetGlobalTexture

You can broadcast a 1d,2d,3d texture or render target texture to all shaders (or materials as you would call them in UE4). You can then sample a texture of specified type and name. For example you can do this in code:
Shader.SetGlobalTexture(“MyTextureName”, textureObject);

In the shader you then sample texture called MyTextureName.
Is there anything similar inside UE4 API?

What I am trying to do is to broadcast screen-space texture to all materials and sample it. I want to change this texture at runtime (update it’s contents, swap it). I imagine that it should be possible to set up a dummy Texture Sampler that points to a texture with specified name and in C++ I should broadcast the texture with the same name.

2

There’s not really any need to approach this differently from a regular texture. Simply create a render target in the editor and reference this in your material instead of a regular texture. You can then write to this texture at runtime and all materials will update.

3

I guess it would be nice if they would add Texture functionality to Material Parameter Collections, but it’s not supported

4

While true in general, that is not needed in the case varfare describes as a single render texture would suffice.

5

I thought about Material Parameter Collection but it does not support textures (but it would be nice if it could!). But yea, render target will work perfectly in my situation.

6

How about Shader.SetGlobalMatix?

I have some precomputed(in C++) matrix(a lot) and I want to make in available in .usf material file and do some dot products to get my result.

Any idea of how to go about to achieve this?

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