Soft Shadows

Al Hart · 3 May 2009, 00:00

Thanks,

I'd like to try another model.

I'm getting tired of looking at this one.

There are a lot of settings here for density, color, transparency, pattern, blurring, etc. which you will be able to use when I get the Beta out.

BTM · 3 May 2009, 00:33

Soft shadows could probably be good for indoor scenes (windows). Maybe you should make some indoor scenes, as well as outdoors.

Pixero · 3 May 2009, 07:40

Wow, I'm really looking forward to this.
And colored shadows, yeees!

Question, does the line scale factor also go into less than 1 for getting even thinner lines?

Al Hart · 3 May 2009, 13:20

Here is an interior scene:

Here is the result with soft shadows (no cross hatch)

Here is a result with cross-hatch. I don't think it worked well. I might try a light (rather than dark) hatch in the sunny area instead.

Here is a BW image with cross hatch.

Al Hart · 3 May 2009, 13:23

@pixero said:

Question, does the line scale factor also go into less than 1 for getting even thinner lines?

The scale factor can be less than 1.

It scales the entire pattern, line and spaces between lines - not just the lines.

kwistenbiebel · 3 May 2009, 13:34

Hi Al,

Interesting experiments!
I like the soft shadows in the first post a lot. A plugin that can output this effect as a .jpg would be great!

Al Hart · 3 May 2009, 16:52

Aha, this inverse image took some clever balancing and a trick ("leave shadows on, but set the sun intensity to 0 to get an image with the same lighting as the shadow image, but no sun"), but it turned out pretty well.

I have added "Invert" as an option to SketchyShadows.

I think Inverse mode worked better on the interior, then on the exterior. You would need less sun and more shadow for the exterior to work well.

BTM · 3 May 2009, 17:15

... How many layers of cross-hatching do you think will be available, and will NPR Tools be available for macs?

... Also, just throwing this out there, but what would happen if you included cross-hatched shadows and sun?

Al Hart · 3 May 2009, 17:35

@unknownuser said:

... How many layers of cross-hatching do you think will be available, and will NPR Tools be available for macs?

... Also, just throwing this out there, but what would happen if you included cross-hatched shadows and sun?

Probably 4 layers, but you will have to use a naming convention for the patterns (so I can select the first pattern - say Lines_1.jpg - and I can know that the other three are Lines_2.jpg, Lines_3.jpg, etc. - So I won't have to prompt for the names of all 4 pattern files)

I hope to make a Mac version in time for the next "Design Visualization Center" conference. (as far as I now it is not scheduled yet).

I will try to dual hatching - perhaps reversing the order or the patterns to so they won't just run together.

Al Hart · 5 May 2009, 05:12

This is the first pass at double hatching - dark hatch in shadow area, light hatch in illuminated areas.

There are a lot of options you can balance - cross hatch colors, cross hatch intensity, cross hatch size, cut-off between single hatching and criss-cross hatching - but this should give you an idea of what can be done.
Note: the hatching here is based only on shadow intensity. If I can find a way to determine the z-depth of the image (How far each pixel is from the eye), then we could have the hatching pattern based on the distance from the eye as well - which is often very effective.

Comments?

Chris Fullmer · 5 May 2009, 05:37

Ooh Al, I REALLY like where this is going. It sort of Gorey-esque (ok, not exactly, but perhaps in that vein).

(www.spamula.net)

(sorry for the weird domain name on thos images, its nothing to do with spam. Its a literature website with some great Edward Gorey Images)

Chris

pilou · 5 May 2009, 13:28

Maybe some hatching at Gustave Doré home
and here beautiful examples

Al Hart · 9 May 2009, 18:34

BTM - I am using 6 of your patterns in the NprTools. These are working great.

But I need two more (see arrows). Then you will qualify for a free copy of NprTools.
(The two that are missing are horizontal and vertical thick lines)

Here are samples of criss-cross shadows using your think and thick lines.

BTM · 9 May 2009, 19:09

Al Hart · 9 May 2009, 19:38

Oh No:

Then I will have to add another row to the dialog (thin, medium, and thick)

(Actually that will be great! )

I'll watch your post of 1:09 - because you will probably add the images to a previous post.

BTM · 9 May 2009, 20:10

New post!

BTM · 9 May 2009, 20:51

here's another (Possible) set; the diagonal lines are the same as eachother, but one's flipped vertically, because my other attempt didn't work The diagonal and non-diagonal patterns don't seem to be the same style exactly ( They were drawn on different surfaces; I should remember to draw them in the same places...), but they SEEM to work well together anyways. I don't know if you'd really want them or not, but I'll post them here anyways.

BTM · 10 May 2009, 00:25

... tomorrow I'll switch the horizontal and vertical lines on that last one for some that match the diagonal. But not now.

Al Hart · 10 May 2009, 04:29

Thanks, BTM

If you decide to upload all 12, in a zip file (which would be easier for me - since I can download all 12 at once), then name them 1,2,3,4 for each type.
(Criss-cross shadows require that the various patterns go up by 1, e.g. if xxx1.jpg is the first criss-cross, then xxx2.jpg needs to be the second.

Also, if you have the opportunity to easily save them as .png files, then that will improve the quality of the product that much more - by not having to deal with the loss of quality with .jpg compression.)

Also, when you get your copy of the product, and try them out and if you want to change them, all 12 images are stored in a folder -
(It will actually be called: C:\program Files\Render Plus\RpTools\appl\NprTools\Images )

Other users - you will be able to select any group of images of you own for use as patterns as well.