Weird texture map changing due to downsizing

idli

So I made a test, after someone suggested to export maps at higher resolution and then scale them down to keep the details that are not visible when working on lower resolution. So, in Substance Painter there is visible difference when you work on 2K or 4K. So once texturing was done, I experimented with exporting them at highest resolution = 8K. And also exported as 4K to compare. Then downsized the 8K to 4K and duplicated all materials in Marmoset with exact same lighting and settings, and just swaped textures. The one on the left is substace original cage, then 8K texture in Toolbag, then 4K exported original, and 4K downsized in photohop from 8K hoping to see the result or not, and this happened. Albedo maps all look the same without any changes in brighntess or color, and all maps are 8 bit. But the cage appears like washed out..

Anyone experienced or know why is that?

rollin

Hi
I'm quite sure the downsizing is not the source of the issue. Maybe the re-saving.
But this is some of these issues you have to solve yourself as no one knows what you did. 
From a technical point of view, downsizing does not result in this.

Obscura

Looks like the colorspace changed. Where did you resize this? Re-saving a png in Substance Designer is known of changing the color space.

idli

hey, thanks! Bingo! it was color space inside the marmoset:

Obscura

Cool. This is the first thing to look at, when you have mismatched colors in your renderer,  relative to your textureing software. The srgb "on" is the correct setting for base color. Most if not all other textures needs this option to be off.

idli

Yeah In UE4 I always have to uncheck it for most maps, but Marmoset usually imports everything automatically, so I completely forgot and overlooked this setting, again, it was dupliate material, so it shouldnt really change there, but I should remember now!