Resolved 2.5D lighting using 2D lights (isometric)

Edit: solved, read the first comment

Hi, I am trying to implement isometric lighting using 2D lights and pixel perfect camera. I am very close to a full solution but when the pivot of a gameobject is offscreen, it fails because the _LightTexture_0_0 is only rendered within the camera frustum(or the scene view camera frustum).

So does anyone know how I can draw the Light2D batcher result of a larger camera to a render texture? Or how I can add padding to pixelperfect camera? I also tried rendering everything to a render texture with a larger non-pixel perfect camera and blitting that render texture to the smaller pixelperfect camera but it ̶d̶i̶d̶n̶t̶ ̶d̶i̶s̶p̶l̶a̶y̶ ̶a̶n̶y̶t̶h̶i̶n̶g̶ wasn't pixel perfect even when both cameras used pixel perfect. Any other solution is welcome

The images&gif and the package are from 2023.1 beta

example gif: when the pivot of the lowest pillar leaves the camera frustum the shader fails because LightTexture doesnt have "padding"


shader for the pillar and the cube:

the light texture in the shader(you can also get this by using a sprite custom lit shader and using the Light texture node):

 

Correction: It looks like rendering with a larger non-pixel perfect camera to a large render texture; then rendering a screensize region of that rendertexture with a pixel perfect camera works, I don't know why I was getting non-pixel perfect behavior yesterday.

I'll update this post with a guide and a demo scene when I have the time

 

Thank you so much! This is exactly what I would need. Would be very appreciated if you would provide guide and a complete example.

 

I’ll write a small guide alongside possibly a guide for geometric 2d shadows(shadows bend when it hits a wall etc) tomorrow
edit: had to fix a camera order related bug, I'll write the guides & repositories first thing in the morning tomorrow!

 

Thank you very much Venediklee!

 

heyo, I wrote a guide in this post:

https://forum.unity.com/threads/2-5d-geometric-shadows.1490683/