Motion blur shader?

Idea 1... make couple of cameras always front of player with alpha depends of player speed...
Result: but this will kill FPS (VGA) to screenshots

Idea 2... Or make all entitys in the level with my.move = on; my.streak = on; with vel_x/y depends of camera orientation
Result: but this will kill CPU

Idea 3... every entity creates his own couple of clones with fadeing alpha from his position to camera position when moving
Result: Kill them both

Idea 4... turn on bloom and then entitys creates only one clone with changing scale_x/y depends of camera orientation and speed and those clones have a gradient alpha schannel
Result: I have no idea

So we need some shader like blur but working with changing player orientation (pan/tilt) during c_move... but I'm totaly grren with shaders

Last time I've seen nice motion blur effect in TestDrive Unlimited... In this game U can make a photo of Your car and doing this You can change "power" of motion blur by slider! Your car is not moving but with this slider it looks like photo has been made during full speed. Strange is that it's looking like every entity on the screen creates own clones

BTW.. I HATE CONITEC!!! (joke) because now I'm not playing the games like always before but during the play I'm looking at this game like "how they made this or this" and how I can do that looking at the engine, effects, moves, cameras... not just enjoing the game
Lara is not just climbing anymore... now she is traceing and c_moving

thanks for the ideas guys!!

na, I don't think it would work that great. Only entities would have the blur (not the world), and making copies of entities will slow down alot as well...

...As for the matrix dev's, That wold be wierd. I'd be constantly paranoid... lol...

This isn't a shader, but you can fake a decent motion blur effect here:

http://www.coniserver.net/ubbthreads/sho...true#Post703206

Interesting... How does it work? I see that there's a panel that has a copy of the screen, and alpha is set depending on the time passed between frames. But is that it?

Wow really cool

I see that there's a panel that has a copy of the screen, and alpha is set depending on the time passed between frames. But is that it?

Yep! It's cheap and easy, like a good date.

By which I mean this.

I have been using Ichiros' blur method for a while as a nitro boost effect.
It works very, very well.

I'm deciding if I should use 3DGS or Sylex for this.

I'd much prefer to use 3DGS, but I don't know how to set up PP efects.


A have the image.
Then do I apply it to a model?

How do I get the image through the shader and back to the screen?

Thanks PHeMoX, I got the answer from your 10 PP shaders...

he, Thanks for PM Tompo

I've gotten a basic shader done. I've got to run to work now so I don't have time to set up a demo. And by demo I mean release the code in a usable way

I'm workin till midnight, so I'll set it up when I get home (~9 hours).

It simply blends 4 different shots of the screen at different alpha levels. It's simple and dirty. There aren't any time calculations for alpha values yet, but will be added soon!

It uses another view, so it will be a lil slower. However, it uses four bmaps as render targets and avoids bmap_blit, so its not that slow...;)

The problem with Ichiro's shader, while great, was that it didn't work with bloom. Hopefully the one your testing works with bloom Guitar, that'd be nice!

It depends... My shader simply renders another view over the camera, using only GS.

It's a mess of "depends" to know if bloom would work with it, but you could always add another pass to the shader which does bloom. I'm writing a bloom shader now for Broozar, perhaps I could implement it into this one. I'd of course keep two seperate version of it though

The problem with Ichiro's shader, while great, was that it didn't work with bloom.

Can you point to that shader (if it's publicly available)? I'd like to give the two a whirl together.

[AFAIK] What William said is true. Bloom is done after the rendering. Since the view is rendered onto a bmap, the bloom has not been done yet...

Yeah. I just figured I might be able to come up with something.

I've got the "cheap" version of it finshed, zipped, and ready to be published. However, my host has left me a month ago, so who wants to host it?!

Simply copy the files into your project folder (Blur.wdl, Blur.fx, Blur.tga). And include <Blur.wdl>; into your main script. You can adjust the amount of blur through the blurStrength variable at the top of Blur.wdl.


Uses 1 additional view, 4 render targets, and a PS2.0 shader. Requires A6 Pro. ALL COMMENTS WELCOME! Still a WIP. Needs to add ACTUAL BLURRING...

Altough i don't have PRO and PS2.0 i can host it. PM or email me

Ah. Thanks.

Thanks to the very generous PHeMoX, here it is: Blur Shader

It's just a little demo thing, but it's something

I tried it out. Although, it doesn't seem to have the bloom, and I couldn't figure out how to properly scale the entity that the view is being put on, to the screen's size. Screen becomes a bit darker too, but mabye this was the lack of bloom. Fog also doesn't work yet.. Overall though, pretty good job so far. I wonder though, is motion blur possible with bloom? Thanks for showing it.

- Bloom: Havn't added any bloom yet

- darker: It shouldn't be, but it may be due to mixing the four copies of the view

- fog: Sorry, I forgot to have the blur's view copy the fog parameters from the camera view.



I know this isn't anything special, I just wanted to release something to show progress... sorry

Nothing to sorry bro you are doing great job and free

I havn't actually tested it myself, but my guess is that it has something to do with rendering to textures. {i'm guessing] that rendering to a texture comes dircetly from the view, not after any effects...

I [believe] that I used vec_lerp() for blending the images on the blur shader, but perhaps I changed that after I sent the code to PHeMoX

@ xXxGuitar:
Your shader doesn't look like real blur..
Is there an other way doing it?
Like that:
http://www.bizarreonline.net/news/images/studioupdate/photomode/02_motionblur.jpg

interesting.. at this screen olny trees has a motion blur... rest of buildings have only bloom. The same is in f.e. Test Drive Unlimited.
So maybe my idea to create clone (maybe less detialed) for entitys (trees) and scale it x/y depends of camera position and add a gradient alpha channel to better looking... it's not so bad idea?

well... with shaders... 4000 polys per model .... this gonna be hard..

There are many problems with doing motion blur. For example, if you had an object fly past the user (standing still), you would want it to blur that object, yes? However, the PP shader doesn't know which pixel to move, or which dirrection to smear them, so I take several shots and mix them newest first, oldest last.

However, that method does not actually "blur" objects, it just creates several mixed copies of it, which "sort-of" blurs it

I havn't added anything to the shader (besides lerp() for better mixing), because I don't really know what to do next. If anyone wants to, please feel free to take my release and continue it.... I'm out of ideas and time

http://ati.amd.com/developer/ShaderX2_MotionBlurUsingGeometryAndShadingDistortion.pdf

^^ if someone is feeling a bit clever it actually has a lot of the shader there. i didn't look at it enough to determine how much is directly usable with GS, but it looks good! i think their implementation would work better with balls than complex objects, but i've got some ideas that could be used with animated objects if i have time this weekend.

julz

if you have the new rendern monkey 1.62 then you can get the motionblur from it
you must export it almost to a fx file.

eh, not sure about this. It will, like anything else, only work for models. Being said, rotating the view quickly would not blut the object if it were still. This soley depends on the objects velocity.

As said, it might not work well for complex models, but reading through the shader, since it stretches by the surface normal, it might actually be fine with complex models...

i think it would be best for object-based motion blur though. you couldn't use that example for motion-blur of animated models because polygons are definitely going to intersect with each other a lot, particularly with complex hands, fingers, etc.

on second thought, the blurring would make the intersections a non-issue. i was thinking about it at school, and thinking that a closed fist has normals in lots of different directions, pointing towards and away from each other. very fast-moving fists would have a lot of intersecting polygons, but it shouldn't look too bad if everything is blurred and smoothed.

it would work with rotating models of the relative velocity was vertex-based, not object-based (which would be required anyway for blurring animations). each entity could remember their own camera-relative vertex positions in an array (may be easier with lite-c if you have global structs that point to an entity and contain an int[array] with relative camera positions for each frame).

i haven't learned how to pass extra info (such as an array) to a shader yet (i'm very fresh at this), but i will in a sec after i do some experiments for a school project.

julz

NVidia uses a very similar method as what I did, but they used 16 frames instead of 4. 3DGS materials are limited to 4 textures though, so without a DLL, no luck

They also used a different mixing method (which I will look into) that adds a sort-of "bloom" effect to it, which in turn, blurs the image for better mixing. I'll have to give this a try...