Hi,
I extruded the lightshaft effect from my Wavefield demo to an extra project and optimized several aspects.





Thx to Slin who converted a HLSL function to Lite-C wich gave a significant speed boost.

Get the demo from here.

Just check the readme for more information about how to implement the effect in your project.

Have fun,

Hummel

neat! thanks a lot for sharing this

This looks (especially ingame) really great, maybe the nicest sun of all videogames that I remember. And thanks for sharing, too!

Looks great, as all shaders from you. Thank a lot

Thanx for sharing!

think i followed the file correctly but i still get the error: PP_Add(mPP_LS_pass1_FX,camera,RT_SUNMASK2,NULL,NULL,NULL); wrong number of parameters though i dont see the difference between how i call it and how its called in our demo

that´s strange...do you use the PP_Helper.c file from the demo?

Include the PP_HELPER.c (before the LightShafts.c). That is missed in the readme-file

year I forgot that, but than he should get a 'function unknown' alert...

i did include that file

when your project is not too big just upload it somewhere - I´m going to take a look at it if you want
send me a PM

well my project is huge.. lol

Wow I love it!

ahh, found it, some other shader was causing the problem, one of slins blooms shaders, it doesnt seem to work with shadeC's hdr also.. i did get it running however, like the speed of it

the rays in the demo don't show up for me. There is no error message, but I can't see the sun in the sky and it doesn't cast rays. I can move it using the cursur keys, but that only changes the lightning on the ground.

my ATI HD 3780 graphics card should be able to handle it. drivers are a bit older, I might try updating it later.

hehe, ATI always sucks

@darkinferno: I asked you whether you are using the PP_Helper.c from the demo or not because I modified the functions to support MRTs -> more parameters

EDIT:
I uploaded a small vid.

While making the vid I noticed that the calculated sunpos seems to be the one of the last frame but I was not able to correct that know...
You can see this when you use a small and/or fast moving sun

Fortunately, you're right!
BTW, the shader looks amazing

The sunrays look really good. congrats. *thumbup*
After looking a the code i may found the reason why it doesnt work on amd cards.
You cant mix shadermodel 3.0 and 2. (or less) in the same pass, pixelshader 3.0 are only specified to be run with vertexshader 3.0. Nvidia drivers don't complain about this but amds does.

ahhhh alright, didnt know that thx!
@Schokokeks: just change this line in skycube_FX.fx: VertexShader = compile vs_2_0 VS(); to this: VertexShader = compile vs_3_0 VS();

Thank you hummel, changing that line worked indeed.
Great effect! can it also be used for larger/more detailed levels or will it get too slow?

the speed is independent from the complexity of your level

Any chance of this in c-script?

not from my side...

What a nice looking effect!


Is is also possible to attach this effect to an model to let it "shine" (for example to light ball) ?

@hummel

can you again upload the lightshafts ? ^^ i know this thread is older

Yes, I'd like to see them too

As far as I remember it didn't work with A8, maybe it needs some tweaking. I can search my HDD for it if Hummel won't mind.

Greets

I sit and still hope you upload it.
but stop ! why should not it run with the A8 ?

It seems to me that there are some changes in A8 which are affecting shaders. Anyway, here is the demo:
Download link


Best regards!