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Motorway and Foliage - Grass
JUL
18
2009
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This post will be updated with random images, then when the project is completed I'll order it - so for now it'll be all a bit of a mess.
Some grass and foliage tests I've been working on. The video is of randomly (although you wouldn't think it from the brief video) moving and populated grass. The image below is static, but also randomly generated from a series of grass blade model meshes.
I'm leaning towards the style from the video, simply because it's animated and also is quicker to render, although for a still image, the static would obviously be better as it looks slighly better - although I will continue to work on the animated grass.
Further tests included using displacement textures, which, depending on the amount of grass I need, may prove to be the best - certainly for long range. Because it isn't actually using polygons, it renders much faster so is better for larger areas. There's also a small amount of moving grass inside the displacement texture map area to hopefully provide a better result.
This may be the method I use for wider angle shots, and then for closer shots set it up to use the completely animated style as in the video. This should be less of a problem where the camera is in motion, as it would be difficult to actually tell exactly how the grass looks when it's more of a blur.
I'm also using this opportunity to experiment with other render methods including lighting and mental ray raytracing and shadows.
Bloom and lighting effects, as well as camera effects such as vignetting and (buggy) depth of field:
Sky change, trees, specular highlights, road textures, lens blur:
More objects added. Close to being ready for vehicles and animation now - need to dirty up the textures really first though I think...
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