When a craft over about 4000 pixels (3780px no lines - 4720px lines) tall white horizontal lines appear.

I can say it's not height that does it. Check out these two examples. Exact same craft, same render settings. Added those horizontal tanks and BAM.

I'm still at a loss... Perhaps a memory issue? Does the shader not scale to that size? I don't know anything about shaders outside of their existence

A friend gave some very sage advice to me: "How do you think Unity likes textures over 4096px wide or tall?"

I don't get any artifacts if I clamp the output image to 4096!

Implmented fix 2e29a62 as a temporary measure.

Will have to revisit this issue. There should be a way to get a much higher resolution.

Maybe for image sizes over 4096 we separate the target image into 9 sections. We just move the camera to focus in those 9 sections then reassemble the image (using GDLibrary or something). Assuming there is no camera distortion we could do this.

If in Orthograhpic, translate camera up/down. If in perspective, rotate camera up/down.
Would also need side-to-side. I wonder how aliasing would work on stitching the final image....

ya we'll have to ping someone who knows more about this.

If the pixel distortion starts at 4096 then we know its definitely a memory/RAM related problem.

I still think these lines are appearing because maybe we're forcing too much down ksp/unity's throat.

We'll have to keep looking into it. Thanks for the ideas.

Issue is Blue Print Shader.

Will have to Phase out this shader. Maybe eventually replace it with bitmap pattern.