Gradient color problem ?

Hi, there.

I like mapping polysurfaces(over 300pieces) with gradient colors.

So, I tried to bake "brep & gradient & bake (refer to attached images)"

I got a result. but It's not apply color gradient "rendered mode" only.

Orther modes(ghost, shade, X-ray......)is OK!

And I tested in lumion(render tool). --> either, there was not gradient colors.

I hope export to orther tool(for render_like lumion) with gradient color mapping.

Any ideas?