Hi Niloy,
Rainbow can be very curious effect indeed in Bryce. Here is how to bring rainbow to your works.
1. Go to the Sky Editor. You know where it is? From the Top Menu:
Objects-Sky Lab
2. Click on the Atmosphere tab.
3. You will see the rainbow option staring at you. Check it.
4. Here is the important trick. Rainbows are always shown on the opposite side of where the sun is. So you must point your camera towards the opposite of the sun. In other words, the sun should be behind your camera.
Lemme know if you could make it.
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Dust fills my eyes / Clouds roll by / and I roll with them / Centuries cry / Orders fly / and I fall again
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