the demo:
the picture:
Hi,
Please provide a PG. I suppose you would need to increase the ‘resolution’. Or use a higher definition source…Or - you could create your own dome using a material where you can change filtering and anisotropic.
Edit: At the extreme, you can also add a renderingPipeline, use sharpen and increase samples. Though, it will affect the entire scene unless you sort the scene and clear the buffer. I cannot really recom this solution.