Image Compositing From First Principles

[@kubolor1234]

Please dont give up on this channel

[@vojtechproschl]

I won't! Thank you for your encouragement!

[@stefano9135]

Thank you so much, this was very interesting! Lately I've been trying to learn Blender from a more technical side and this is the best explanation of the Alpha channel I've seen so far :)

[@vojtechproschl]

You're welcome. I am glad to hear that!

[@shantanu83]

Amazing video, simple and cool!

[@vojtechproschl]

Thank you!

[@eigentensor]

I have an autograph from Tom Duff in my PBRT book

[@vojtechproschl]

That's great! He's such a legend in CG. Where did you get it?

[@kaviraj_vfx]

Thanks for the explaining the mathematical part visually..😊

[@vojtechproschl]

You're welcome!

[@Delta0001-y]

Great video!

[@vojtechproschl]

Thank you!

[@kartikeyaShetti]

This video should be released at least 2 years back. It would be given new directions to students.

[@vojtechproschl]

Your comments are always heartwarming 😄 I also wish I'd started with this sooner.

[@kartikeyaShetti]

@@vojtechproschl waiting for next video❤️

[@Delta0001-y]

What is the purpose of using the semantic: “the probability of A being visible” instead of “The opacity/alpha value of A”? Just curious.

[@vojtechproschl]

The main rationale behind that is that authors of the alpha compositing paper treated opacity as the probability that some particle intercepts your view of the pixel, so I've stuck to that. Besides, I think that using probability instead of opacity makes it a bit clearer where these formulas come from.

[@Delta0001-y]

@@vojtechproschl makes sense, thanks for the context.

[@vojtechproschl]

​@@Delta0001-y You're welcome!