Swapping textures in a dynamic material instance with preloading

Development Rendering
1

I have a bit of a weird problem. I have a material fed with only one texture parameter. This texture will be swapped out and replaced with 10 different textures from a blueprint. When you press a button the blueprint will cycle through the images and display them on the mesh.

I have a slight problem though, and I am not quite sure where it’s coming from. When I press the button the image changes, but for 0.1 seconds the image is blurry and after that it returns to a normal state. It seems though as if it does not have enough time to finalize the image or something similar. So, does anyone know where the problem might lie? Can I preload the textures somehow?

The textures are 2048x2048, they have streming enabled and so on.

Cheers!

2

what you’re seeing is ue4 streaming in mips first, probably at 256 or 512, until it can load the full 2048. you could set a minimum mip level for it, or disable mipping, but that will cause aliasing problems at distance

3

Another option would be to create instances of the material and assigning them to the mesh.
Or try and use 2 materials and toggle between them (double buffer style), but Im not sure if that would make a difference…

4

Set two textures at once for material and lerp between them based on frame fraction. Or just don’t use second texture but this way engine is forced to stream it.