Which textures mode to use when using .tx textures?

[Alex_M]

Hi,
I have a scene where most of the textures are .tx format. Which textures mode should I use in this case - full, on-demand mip-mapped or resize?

[hermit.crab]

The .tx image format is a container of tiled bitmaps with different resolutions, designed for mipmapping. It would certainly help with a project's VRAM optimization. However, this does not restrict you from utilizing the other texture modes - it's a question of optimization vs. quality.

[Alex_M]

Thanks for the reply. So if I use Full mode, would I benefit from the memory conservation properties of .tx textures or will Vray always use the highest resolution mipmaps? Should I use mip-mapped mode if all my textures are .tx and would my texture quality suffer in any way? Which mode is best for IPR rendering if I want fastest time to first pixel and which is best for final rendering where I want both highest quality and memory conservation?

[hermit.crab]

So if I use Full mode, would I benefit from the memory conservation properties of .tx textures or will Vray always use the highest resolution mipmaps?

No, V-Ray will use the full resolution image.

Should I use mip-mapped mode if all my textures are .tx and would my texture quality suffer in any way?

Mipmapping works by using lower resolution images for objects that are far away in the background (there really isn't a point in loading a full-resolution texture for objects, the details of which are not visible anyway).

Which mode is best for IPR rendering if I want fastest time to first pixel and which is best for final rendering where I want both highest quality and memory conservation?

Mipmapping is the most optimal.

[Alex_M]

Awesome, thanks!