Shaders Help with Post Screen Crepuscular/God Rays...

[TheStolenBattenberg]

Hey,

Thanks to the previous help from xygthop3 [Here: https://forum.yoyogames.com/index.php?threads/3d-position-to-2d-position.41203/], I was able to get my 3D Crepuscular Rays shader working. As said there I'm not too good when it comes to shader programming; so I'm not sure if this is possible.

Here is what I have at the minute:

Spoiler: Image

This is good, but if I turn the camera around:

Spoiler: Image

Light doesn't do that, and I don't want it to in the shader.

I guess what I'm asking, is how can I stop the rays from coming from any direction, rather than just from the sun? Currently Rays just come from anywhere that isn't occluded, which isn't good.

Thanks,
- TSB

 

[obscene]

Well I have zero experience with 3D so I don't have the "right way" to fix it, but you could just fade the effect in and out based on the direction the camera is looking if you wanted to settle for a simple fix.

alpha=1-(abs(direction-sun_direction)*.012);

This would fade it to 0 by the time the camera was at 90 degrees to the sun.

 

[TheStolenBattenberg]

I wish it was that simple, but after trying it it doesn't look right at all.

 

[xygthop3]

Here's a link to an old 3D god rays effect I did in 2013, it works fine with GMS 1.4
Hopefully it helps you with your issue

https://www.dropbox.com/s/13gwt4h1hok5eon/3D God Rays RSS.7z?dl=0