Create a Film grain ?

[Skinnycap]

Hey Interlopers!

Is it hard to make a film grain?
i have give it a try, but no results
Here is 2 picture of the map, one from the game.
and one from how i want it to look like

FROM GAME (NO FILM GRAIN)
http://fuskbugg.se/dl/t4AcaK/dsad.jpg

FROM PHOTOSHOP (WITH FILM GRAIN)
http://fuskbugg.se/dl/xgbK1U/creepy_house30008.jpg

Any idea of how this can be made?
I have tryed google it =/



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old thread

Hey Interlopers!

I have a question about this ( i think it's a screenoverlay or something )
Look at 07:40

How did they do that?
I have been looking for something like this for a while now, and can't figure out how to make this.
any idea?

I would really like to know and use something like this.

[nub]

You're speaking of the film grain effect as Gordon got close to the radioactive waste? That's probably easily achieved with a screen overlay, though they could have coded their own shader or something for that purpose. If it is a screen overlay, then there's a texture somewhere in the BMS files that you could use.

[Dives]

My best guess is they used an env_screenoverlay with a translucent animated texture, but the best way to find out would be to decompile the map to see for yourself.

[Major Banter]

I'm not so sure it IS an overlay. Strikes me as more of a shader thing, a la L4Ds film grain.

[Skinnycap]

My best guess is they used an env_screenoverlay with a translucent animated texture, but the best way to find out would be to decompile the map to see for yourself.

I have looked at the same map as in 07:40 and there is no trigger there that tells the player to activate the overlay :S and i can't find the texture of it in the effects folder in the BMS mod :S

anyone wants to give a try?


thank you for your help!

[nub]

Perhaps they use a custom brush entity for the toxic goo to trigger the film grain based on the player's proximity? It's sounding more like a shader to me than a screen overlay. But a screen overlay with an animated texture would probably be just as effective if done right.

You made sure there was no env_screenoverlay anywhere? I've been looking through the texture files and can't find anything that resembles a film grain. I doubt they'd use stock content for that...

I'm not so sure it IS an overlay. Strikes me as more of a shader thing, a la L4Ds film grain.

I always thought L4D's filmgrain was simply an overlaid animated texture.

[Major Banter]

To my knowledge, they ended up creating a shader out of it so that it would interact with darkness more effectively - rather than washing out shadows with a slight greyness, it only applies to weakly lit areas of the screen - full brightness wipes it out, while full darkness retains its depth.

[nub]

Ah, I suppose that makes sense.

[Skinnycap]

Perhaps they use a custom brush entity for the toxic goo to trigger the film grain based on the player's proximity? It's sounding more like a shader to me than a screen overlay. But a screen overlay with an animated texture would probably be just as effective if done right.

You made sure there was no env_screenoverlay anywhere? I've been looking through the texture files and can't find anything that resembles a film grain. I doubt they'd use stock content for that...

I'm not so sure it IS an overlay. Strikes me as more of a shader thing, a la L4Ds film grain.

I always thought L4D's filmgrain was simply an overlaid animated texture.

That left 4 dead film grain.
can i take it form the left 4 dead and add it into half-life 2?
How do i trigger this fil grain?
any special trigger commands?

[Skinnycap]

Hey Interlopers!

Is it hard to make a film grain?
i have give it a try, but no results
Here is 2 picture of the map, one from the game.
and one from how i want it to look like

FROM GAME (NO FILM GRAIN)
http://fuskbugg.se/dl/t4AcaK/dsad.jpg

FROM PHOTOSHOP (WITH FILM GRAIN)
http://fuskbugg.se/dl/xgbK1U/creepy_house30008.jpg

Any idea of how this can be made?
I have tryed google it =/

[MrTwoVideoCards]

you'd have to make a shader from scratch.

[Skinnycap]

you'd have to make a shader from scratch.

Is it hard?
I have no idéa of how this would be made =/
A animated transparent texture as a overlay?
if so, whats the px size of the overlay texture? 512x512?

i can only the command for the texture to move in have direction.
How can i make it looks like film grain? like that shuffle animation

i hope you understand what im trying to say here

Thank you!!

[Leon_Kilean]

oh just remembered this http://www.moddb.com/mods/scintilla/tut ... via-hammer
its crappy but works, shaders are way cooler