create a non uniform hatch

[giannife]

Hello, I'm looking for some help in the task of making the hatches used in my plans less boring; I'd like to add some noise and color gradients.

I'd like to use some non - uniform hatches to obtain something similar to the attached image.

For the building they probably used a gradient hatch.

What did they use for the lawn? A uniform green with a couple of superimposed random dots hatches in darker colors?

For the darker green grass they used some kind of gradient.

For the concrete plaza... what is it? A superhatch?

Thanks in advance.

https://images.adsttc.com/media/images/595d/1743/b22e/38d8/8b00/0036/slideshow/SAN_-_siteplan_-_roof...

[nrz13]

Your example looks like a 3D model with textures applied to the surfaces.  Most of it could be emulated (but not exactly) in 2D AutoCAD with multiple hatches and gradients with transparencies, but I think you'd need a custom hatch pattern for the concrete texture.

Edit:  actually, looking at it closer, it appears the textures may have been manually added in another program, such as Illustrator or Photoshop.

[Kent1Cooper]

The only thing there that looks like a gradient to my eye is the waterfront building's roof, and the water.  The other buildings look like separate Solid Hatches in a lighter shade on the more "lit" surfaces and a darker one on the "shaded" surfaces, as well as the shadows on the ground.

I don't think you can do the right part of the waterfront building roof in an ordinary AutoCAD gradient Hatch, because of the curvature  of the gradation, but a "straight" gradation might do as well for a shape like that.

For the grass, in new-enough versions of AutoCAD you can give a background color  to Hatches, so they could just be a random-dots pattern such as AR-SAND [that comes with AutoCAD], with a light green background color.

It looks to me like paving could be one Hatch pattern for the grid part, and the shadings within that could be done with small Hatches of some fill pattern.

The trees might be done with Blocks in which the shadow is part of the Block definition, or maybe they're actually in 3D with cast shadows.  But the shadows of the trees look darker than those of the buildings, so I'm skeptical about the latter possibility.

The water looks like at least a 3-color gradient in the background color, which also can't be done with a regular AutoCAD gradient Hatch, though possibly with two abutting each other.  The "texture" part of the water looks more difficult to imagine in AutoCAD-style Hatching -- is that a fading out of the pattern, not just a gradient in color?

[giannife]

Thank you for your very good analysis. I'm not trying to replicate exactly what a famous architect has done with his drawings, but I'm also open to suggestions about making a landscape less boring for example with  the use of gradients and superimposed hatches.  

    @Kent1Cooper wrote:


>    For the grass, in new-enough versions of AutoCAD you can give a background color  to Hatches, so they could just be a random-dots pattern such as AR-SAND [that comes with AutoCAD], with a light green background color.

     
I've tried your suggestion, by using multiple hatches one on top of the other, to add some noise to a solid green color. I've used a solid green as the base, then adding two ar-sand hatches with a different scale (light and dark green); I've then modified the thickness of the lines of the hatches, and this helps. I'll need to make some experimentations to find the best result.


>   It looks to me like paving could be one Hatch pattern for the grid part, and the shadings within that could be done with small Hatches of some fill pattern.

Yes, probably it is a hatch plus a superhatch to add some noise.


>   The trees might be done with Blocks in which the shadow is part of the Block definition, or maybe they're actually in 3D with cast shadows.  But the shadows of the trees look darker than those of the buildings, so I'm skeptical about the latter possibility.

agreed on the block with shadow idea idea
     

>   The water looks like at least a 3-color gradient in the background color, which also can't be done with a regular AutoCAD gradient Hatch, though possibly with two abutting each other.  The "texture" part of the water looks more difficult to imagine in AutoCAD-style Hatching -- is that a fading out of the pattern, not just a gradient in color?

[nrz13]

Regarding making blocks with shadows for the trees:

I'd make it a dynamic block with three visibility states with a different rotation and scale so the monotony/pattern is broken up.  Normally you could do this with parameters in the dynamic block, but since you want all of the shadows oriented the same way, the visibility states would be the best option, I think.

[nrz13]

How I could tell it was manually done:

Unless that middle building is in some other dimension where it doesn't cast a shadow...

[timothy_crouse]

I know this is an OLD thread but ( I am not a sales guy) you may be interested in URBAN LISP.

The $10.00 lisps will save you a lot of time as well as provide the random looks of urban landscapes

https://www.urbanlisp.com/

Also, I have attacked a lisp found previously that inserts blocks in a closed polygon in a random layout.

Best Regards

-Tim C.