Hello,

I'm trying to use autocad as an intermediate step in a photolithography process. The intent is to export as a dxf from Klayout then convert into a grayscale 8 bit bmp with AutoCad. This allows the photolithography tool to do a gradient write.

However, I have encountered 2 problems:

1. If I'm in 2D wireframe mode, I can get a black background, but there are red polylines on my drawing that mess with how the machine interprets it. I haven't yet found any way to get rid of them.

2. If I'm not in 2D wireframe mode, the red polylines don't show up, but I can't get a black background. Tampering with the display settings only changes the background in 2D Wireframe mode. Editing it in externally in a different program seems to make the file not interpretable anymore.

Fixing either problem would allow this process to work. How can I fix this issue on mac?

Thanks

Examples and dwg: