JavaScript creates dynamic three.js animations on top of an image


When you visit the link above, you will see an animation of stars and a sphere reflecting that animation.
My goal is to have https://i.sstatic.net/VpxWH.png

It would mean that the reflective sphere is displayed on the astronaut's helmet. I am struggling to find a way to make this happen...
Any advice or direction would be greatly appreciated.
The astronaut image for the webpage can be found here:
https://i.sstatic.net/oCGTO.png
Thank you in advance.

Answer №1

To avoid rendering the helmet above the image, consider making the shade of the helmet transparent. This could be the simplest solution in this case.

Instead of keeping the black color of the helmet, replace it with transparency while maintaining the reflections of the arms and shoulders, which should be partially transparent. Render these reflections along with the rest of the three.js scene behind them.

Alternatively, you could try to accurately fit the reflection onto the helmet using techniques like the stencil buffer.

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