Hello, could you please add upscaled thruster exhausts?

Hi, I assume you're referring to the long, white, blue-to-red exhaust trail behind the thruster.

The thruster itself, the short, small flame at the back in the center of the thrusters, and the clouds of smoke at the bottom edge of the image are included HD textures in my mod.

The white, blue-to-red exhaust stream between the thruster and the smoke clouds is not a texture in the traditional sense, it is generated from an image with a color gradient. It is an EffectTexture without a scaling variable. As a result, I cannot upscal this effect.

ah :/, i guess you cant even change the texture size in mod so it would generate it more hd?

Exactly. Since there is no scale factor, only the top-left quarter of a texture that is twice the size would be used.