God Rays

nonesuch00

Hey,

I want to make Godrays like on the old Japanese flag. How do I do that in iRay without buying another product? Or should I just make mesh geometry for the rays since I am going for a cartoony style?

Thanks

Silent Winter

I don't think Iray has a 'god-ray' ability - you'd need mesh geometry (transmapped) or post-work anyway.

(After all, real-life god-rays are the light reflecting off dust particles in the air - you need something there to reflect the light)

nonesuch00

Thanks. I will make a mesh then.

kitakoredaz

Why not use  iray volume , and apply not ray mesh  obj,  but contena of room to reflect ?

http://blog.irayrender.com/post/132864644411/volumetric-effects

though it really take time to render,,,

https://www.daz3d.com/forums/discussion/comment/2672986/#Comment_2672986

If you make glass with frame,  only lay can through out glass part, you only need to show them as volume I think. 

 

nonesuch00

I will look into that and if render doesn't take too long try it.

kitakoredaz

It actually  took  really long time for me, ^^;  

nonesuch00

Ok, thanks

Cris Palomino

Oops...without purchase.

Chohole

To make a god ray (Crepuscular ray)  use a cone.  so to make several use several cones.   
https://www.daz3d.com/gallery/#images/1167


  To make a sun use lots of cones and superimpose a sphere

nonesuch00

Chohole said:

To make a god ray (Crepuscular ray)  use a cone.  so to make several use several cones.   
https://www.daz3d.com/gallery/#images/1167


  To make a sun use lots of cones and superimpose a sphere

Ah, that's what I want thanks. I already made the sun using the DS primitive for a sphere so cones will work good with that. 

andy vron

Chohole said:

To make a god ray (Crepuscular ray)  use a cone.  so to make several use several cones.   
https://www.daz3d.com/gallery/#images/1167


  To make a sun use lots of cones and superimpose a sphere

God rays should really be more parallel ...the light is supposed to be far away right?

nonesuch00

What she did is mostly parallel but not completely parallel because it encounters resistance and refraction.

andy vron said:

Chohole said:

To make a god ray (Crepuscular ray)  use a cone.  so to make several use several cones.   
https://www.daz3d.com/gallery/#images/1167


  To make a sun use lots of cones and superimpose a sphere

God rays should really be more parallel ...the light is supposed to be far away right?

 

Chohole

andy vron said:

Chohole said:

To make a god ray (Crepuscular ray)  use a cone.  so to make several use several cones.   
https://www.daz3d.com/gallery/#images/1167


  To make a sun use lots of cones and superimpose a sphere

God rays should really be more parallel ...the light is supposed to be far away right?

 

These are called crepuscular rays, and are caused by clouds blocking the sunlight, their long shadows cast on haze and other particulates floating in our air.

Those rays fan out, spreading away at different angles… but that’s an illusion! The rays are parallel,The fanning out of the rays is actually an illusion, caused by perspective! It’s precisely the same thing that makes railroad tracks or long roads appear to converge in the distance. Things farther away look smaller, so the parallel rails of a railroad track appear to get closer together as you look farther away. For railroad tracks you look down to see this; for cloud shadows you look up! Other than that, they’re the same.