Dear anisha,

0.024 is a very low value (actually that means 2.4% visible sky fraction)?
Please first make sure, you did cut-off the sky in your fisheye image completely. All the sky needs to be perfectly white. Therefore, please hit "Monochrome" (the button with the black and white sphere on it). All the sky still needs to be white afterwards.
If not, revert the change and continue cutting-off the sky.

Best regards,
Dominik

Dear Anisha,

I assume you got the fisheye loaded into the horizon limitation window, just like I did in the fig. below.

Notice the blue sky and the white part on the left, where you can see some grid.
This grid is what you need in all places, where there is no horizon limitation. Therefore, the blue has to go.
How do we achieve this? Just hit the dropping glass where I wrote "select color" and click the blue sky. Now you selected blue. Check the color preview besides the dropping glass to be blue now. Go on clicking "Cut off" below the dropping glass. The blue now disappeared from your fisheye. Instead you can see the grid there now. Repeat doing that until the sky is clear.



Finally, check the result by hitting the monochrome button (the one the "monochrome" arrow points to). All obstacles need to be black now, while the sky is white. If your obstacles have holes now, because they had a similar color than the sky, you can fill up the holes using the button selected in the figure. Click "monochrome" again to check.

Done.

Best regards,
Dominik

Dear Anisha,

glad to read it worked!

Good success!

Dominik