Lumion can output Ray Traced images in the following resolutions:

(16:9 Aspect Ratio)

• Email (1280x720) 
• Full HD (1920x1080) 
• Print (3840x2060) 

Poster Resolution is currently not available when Raytracing is on. This is due to a technical constraint that affects the tile rendering system used in that resolution, which will be resolved in a future update.

At the moment, for higher resolutions than 4K, we suggest using free online AI upscaling software such as Bigjpg or Waifu2x. 

Comparisons of details between a Full HD and Print image:

Full HD

Ultra HD (4K)

Note:  If your video card is low on memory before rendering high-resolution images or videos, this message may appear :

This article explains why:

• Knowledge Base: What does the message 'Low VRAM detected' mean?

See Also:

• Knowledge Base:  How do you render images at a higher resolution than Poster renderings?