私は十分に賢くない T.T

先生が必要です wwwww

These made me become a lifelong dev, 10/10 would play again!

So cool to see the to-do list! I'm jealous, always wanted a whiteboard for gamedev, been using exercise books.

Yup, that's all. You can do all the filtering you need in the shader. The popular engines nowadays have tools to design shaders without writing code.

I'm glad you like the artstyle, thanks! The shader on the mirror does the costly full-scale reflection (like a second camera render), then I filter the layers I want it to update in real-time.

Thanks! Getting it to work in itself is not that hard, I use a simple plane to set the angle and a shader does the reflection. The difficulty is optimization, and for that people usually filter objects based on what needs to be updated in the mirror eg. moving.