Blending/Switching between Texture Objects UE4

s6

Hey guys. I'm currently looking for a way to blend or switch between  texture objects in UE4 so I don't have to eat the cost of my UV set up, and what happens after the sampler, every time I need a different texture.  I'm assuming there probably won't be a way do operations on a t2d prior to the sampler, but I figured someone a lot smarter than me might know of a way. 

Everything I've tried so far has resulted in cast errors between non-numeric types or just incompatibility between t2d and float inputs. 

Any info is most appreciated! Thanks for reading

Vailias

I'm not really getting what you're wanting to do. 
The texture object can be a parameter I believe, but there really aren't operations you can do on it. Its the chunk of data in memory that IS the texture. So you can load it, replace it, and sample from the data.  The only way to get it on screen in any meaningful fashion is to sample from the texture in some way.

s6

Right, I get that. 

I was just hoping to avoid creating a new sampler for every new texture I need to implement. The leanest solution I can think of is one where I can re-use all my UV instructions, the sampler, and all the subsequent instructions after the sampler, without redundancy. But like you said, It appears you can't perform and operations on it. 

Thanks for your time Vailias!

Vailias

If you're doing some calculations on the UV's and you want to reuse the exact same UV data in the pixel shader part, then you can make your shader more efficient by doing that calculation and piping it into the customized uv's pin.  But for multiple textures you'll need multiple samplers. 
https://docs.unrealengine.com/latest/INT/Engine/Rendering/Materials/CustomizedUVs/index.html

s6

Oh, Nice! That looks really promising. I'll be using customized UV's for sure

Thanks for the Link Vailias!