Post Your Irrlicht Screenshots / Render Here.

stefbuet · Post by **stefbuet** » Wed May 04, 2011 1:52 am

Just a little app I made to illustrate a presentation about physic engines at my school. Basicly it's just a scene with spheres falling. I'm using my lighting manager with deferred lighting here (2 point light + 1 spot light (camera), 1 point light shadow) I still have to work on those shadows, there are transparent when occluder-occluded distance is small. Water is a simple transparent material (rendered with forward method). Antialiasing with edge detection (depth + normals)

hendu · Post by **hendu** » Fri May 06, 2011 3:09 pm

Made a wind shader, and tested it with some grass. (yes, I know, you can just feel the movement in a still picture)

ChaiRuiPeng · Post by **ChaiRuiPeng** » Fri May 06, 2011 3:39 pm

that actually looks nice and clean.

may we get any numbers, performance wise?

EDIT: you can't imagine how much life movement can bring to an environment.

I'd rather see simple blades of grass (like yours), hundreds of them them done efficiently and moving in a realistic manner with the wind, done with shaders, rather than many many billboards with 512 x 512 textures or whatever.

ent1ty · Post by **ent1ty** » Fri May 06, 2011 3:40 pm

It looks like every stalk of grass is a separate mesh - overkill, unless you're writing a bug simulator or something

ChaiRuiPeng · Post by **ChaiRuiPeng** » Fri May 06, 2011 3:42 pm

ent1ty wrote:It looks like every stalk of grass is a separate mesh - overkill, unless you're writing a bug simulator or something

i'm assuming he's using geometry shader flowline to optimize highly

ent1ty · Post by **ent1ty** » Fri May 06, 2011 3:46 pm

Still, even AAA games use textured planes for this. The performance cost is just not worth it, as you can get a very similar effect with the textures planes.

hendu · Post by **hendu** » Fri May 06, 2011 4:38 pm

that actually looks nice and clean.

Thanks

I'm just starting out, playing with shaders

may we get any numbers, performance wise?

My drivers appear to force some kind of vsync even though I have it off, my fps is 120 both with and without the shader. This is a Radeon HD4350, and the grass mesh has ~7200 tris according to the irr mesh viewer.

It looks like every stalk of grass is a separate mesh - overkill, unless you're writing a bug simulator or something

This patch is a single mesh. Untextured, the color is set in the shaders.

i'm assuming he's using geometry shader flowline to optimize highly

Vertex shader only

Still, even AAA games use textured planes for this. The performance cost is just not worth it, as you can get a very similar effect with the textures planes.

It looks pretty damn nice though, so if I were making a game, I'd either use this in well picked spots, or maybe do some kind of LOD. Something where grass nearby is this and farther some impostor.

roelor · Post by **roelor** » Fri May 06, 2011 10:01 pm

You could add it to your game as a grafic feature, when someone selects powerhouse as grafics mode

lazerblade · Post by **lazerblade** » Sat May 07, 2011 4:16 pm

I'm just wondering, what kind of toll would anti-aliasing have on the framerate? I know it can make a big difference framewise, but it can also take an already awesome scene like this and make it just unbelievable. I guess Most of what's impressive about this is how it keeps a high framerate, which would go away if you added too many effects and extra stuff.

Radikalizm · Post by **Radikalizm** » Sat May 07, 2011 8:29 pm

lazerblade wrote:I'm just wondering, what kind of toll would anti-aliasing have on the framerate? I know it can make a big difference framewise, but it can also take an already awesome scene like this and make it just unbelievable. I guess Most of what's impressive about this is how it keeps a high framerate, which would go away if you added too many effects and extra stuff.

Depends on which AA technique you're applying, something like MSAA would probably kill your framerate for example

andrei25ni · Post by **andrei25ni** » Thu May 12, 2011 7:21 am

loki1985 · Post by **loki1985** » Thu May 12, 2011 8:42 am

@andrei25ni: nice, your skybox works wonderful here

Radikalizm · Post by **Radikalizm** » Thu May 12, 2011 11:40 am

@andrei25ni:

I love the detail of the cables and the support tower in the background, gives a nice touch to it

This scene could maybe use some Mie-scattering, since you use a rather foggy skybox/dome it would blend the scene with the background very nicely making it even more convincing

roelor · Post by **roelor** » Thu May 12, 2011 9:42 pm

or maybe a very mild blue fog effect.

andrei25ni · Post by **andrei25ni** » Fri May 13, 2011 7:05 am

Hey guys thanks for the feedback

I do have a blue fog applied, but wasn't that noticeable in that screen.

The game doesn't have any kind of shadows or post effects, when I'll add those it will look more immersive.