Lost duckling. What’s the right thing to do?

Jul 01
2010

The other day I saw a mother duck with about a half dozen little newborn ducklings trailing behind. The site was wonderful. The mother was guiding them away from the housing complex with its dangerous roads and towards the safe haven of the slough, a tidal marsh and bird sanctuary. The mother stepped up on and over the curb, the final hurdle to get to the slough. Each duckling tried to follow. Each of the six ducklings made it except one – the last one. He climbed, slipped, and fell on his back.

Ducklings attempt the curb climb

The little fallen duckling became absolutely helpless once on his back. He squeaked and squeaked but his mother did not come back to help. The mother and other ducklings just kept heading towards the safety of the high reeds and water. The little duckling’s legs flailed. He made every attempt to roll back over and upright but, to no avail. My worry was that if the little creature became separated from his mother, he would die. However, I remembered reading years ago that with some animals, if the mother detected the scent of a human on them, the baby animal would be abandoned. I wasn’t sure if this applied to ducks.

I found a stick (in the picture to the right of the last duckling), and used it to upright the duckling. The duckling made it back on his little webbed feet. I had hoped he would continue on the path up and over the curb to the safety of the reeds and his mother. Instead, he walked in the opposite direction back onto the busy road and to the houses. So I tried to communicate the right direction to the duckling by steering him toward the curb. It didn’t work. He just ran to a puddle in the middle of the road and stayed there.

Duckling goes to puddle on asphalt

Duckling moves to puddle on asphalt

I stayed with the duckling while my girlfriend ran inside to Google whether it was safe to handle the duckling for the ducklings’ sake. She came back in a few minutes to say that she couldn’t find much about mother ducks abandoning ducklings after humans touched them. I then gently lifted the duckling and brought him up to the banks of the bay. The duckling seemed to like the cover of the reeds and stayed there for a few minutes. We hoped that the mother would here the continual squeaks that it made and would come back to get him.

We watched for a while until we thought the duckling was relatively safe. We wanted to leave the scene as soon as we could so that the mother would not be stopped by the sight of us. We left the duckling in the safety of the reeds close to the bank of the bay and near to where we last saw the mother.

Later when we came back to the scene the duckling was gone. No sign of the duckling or mother. We had hoped our plan worked and that they reunited. The question is this:  did I do the right thing by handling the duckling to take it back closer to the mother where it was safer among the reeds?

Close-up of the lost duckling

Did my handling of the duckling help the situation or hurt it? Would the mother duck accept the duckling back? I’d like to know your opinion. We just wanted to help the duckling. Comments welcome.

Discussing Ideas Worth Spreading

Jun 06
2010

Water color by Herb Reed

In play and work, true motivation the activity is its own reward

May 25
2010

The flow of water at Yerba Buena Gardens

Another word for true motivation is “autotelic”. The word Autotelic comes from the word “auto” meaning self and “telic” meaning goal or purpose. An autotelic experience is one that is engaging. The goal of the work is self-fulfilling. The activity itself is the reward. You’ve probably experienced this yourself when you were totally into an activity you love. Many people may have this experience while gardening, or surfing, or hiking, maybe sailing, or cooking. While in this state time passes quickly. Mihaly Csikszentmihalyi, an expert in the field of positive psychology, calls this state “Flow”.

Wikipedia describes Csíkszentmihályi’s work this way: “In his seminal work, ‘Flow: The Psychology of Optimal Experience’, Csíkszentmihályi outlines his theory that people are most happy when they are in a state of flow— a state of concentration  or complete absorption with the activity at hand and the situation. The idea of flow is identical to the feeling of being in the zone or in the groove. The flow state is an optimal state of intrinsic motivation,  where the person is fully immersed in what he or she is doing. This is a feeling everyone has at times, characterized by a feeling of great absorption, engagement, fulfillment, and skill—and during which temporal concerns are typically ignored.”

In Daniel Pink’s book “Drive, The Surprising Truth About What Motivates Us”, he lays out the theory that it is not money, external reward, or even the threat of punishment that really motivates us. What really lies beneath, or our true motivation, is the desire for autonomy, mastery, and purpose. Pink’s website states it this way “The secret to high performance and satisfaction—at work, at school, and at home—is the deeply human need to direct our own lives, to learn and create new things, and to do better by ourselves and our world.” What we really want is to create for ourselves and others as much flow as possible.

From Daniel Pink’s book “Drive”: “For example, Stfan Falk, a vice president at Ericsson, the Swedish telecommunications concern, used the principles of flow to smooth a merger of the company’s business units. He persuaded managers to configure work assignments so that employees had clear objectives and a way to get feedback… The flow-centered strategy worked well enough that Ericsson began using  it in offices around the world… Falk moved to Green Cargo, an enormous logistics and shipping company in Sweden. After two years of managerial revamping, state-owned Green Cargo became profitable for the first time in 125 years-and executives cite its new found flow-centricity as a key reason.”

15 Essential Vray Tutorials

May 17
2010

15 tutorials that explain how to use Vray effectively

Here is a list of 15 vray tutorials. It covers everything from materials and shaders to illumination and rendering settings.

01) Critical vray  settings
02) How to create realistic grass
03) How to create a lampshade material
04) How to setup a sky scrapper rendering
05) Night exterior illumination
06) Daytime exterior lighting
07) How to render a scene with hdri
08) Night interior rendering tutorial
09) Snow with vray displacement
10) Chrome, silver, stone and glass
11) How to use hdri in vray
12) How to render a liquid in a glass
13) Gamma 2.2 or Linear Workflow (LWF)
14) Vray studio lighting tutorial
15) How to create various reflective shaders and caustics

15 Essential Vray Tutorials – 15 Vray Tutorials at CG Digest

The 101 most useful websites

Apr 23
2010

The internet - like the world - is a massive and often confusing place

There are tens of millions of sites to visit on the internet. Lots you’ll actually need.  Three listed here but there are lots more (click more at the bottom):

1. Make magazine’s videos and podcasts (blog.makezine.com/podcast) have dozens of weekend projects, some macho, some crafty, for the DIY-minded.

2. The Orwell Diaries (orwelldiaries.wordpress.com) publish George Orwell’s domestic and political diaries as a blog, exactly 70 years after they were originally written.

3. Everything on iTunes (apple.com/itunes) is free, amazing given that it offers recordings of lectures from some of the world’s most venerable institutions (Yale, Moma, Oxford, Tate).

More from telegraph.co.uk

VRay for 3ds Max Tutorial – Rendering an Interior Scene

Jul 31
2009

These are my personal notes while reading a VRay 3ds Max tutorial called “Rendering an Interior Scene”
by VRay.com. I have added additional screen shots of the VRay UI, circling the settings I used and the tutorial uses but does not show. The original tutorial URL is here.

Part I: Adjusting the GI settings
Step 1. First render
1 Check the Override mtl option in the Global switches rollout, click the button next to it and select a default VRayMtl material.
2 Set the Image sampler type to Fixed.
3 Render the scene

Saving Render Channels in Vray

Jul 31
2009

Split render channels – this option allows you to save the channels from the VFB into separate files. Use the Browse… button to specify the file. This option is available only when rendering to a memory frame buffer. If rendering is done only to a raw image file, the render channels can be extracted from that file after rendering is complete.

Save RGB and Save Alpha – these options allow you to disable saving of the RGB and Alpha channels respectively. This can be useful if you only want to generate other render channels. Note that VRay will still generate those channels, however they will not be saved.

source: http://vray.us/vray_documentation/vray_frame_buffer.shtml


What is an Irradiance Map & Why Save It?

Jul 31
2009

“In V-Ray, the term irradiance map refers to a method of efficiently computing the diffuse surface irradiance for objects in the scene. Since not all parts of the scene have the same detail in indirect illumination, it makes sense to compute GI more accurately in the important parts (e.g. where objects are close to each other, or in places with sharp GI shadows), and less accurately in uninteresting parts (e.g. large uniformly lit areas). The irradiance map is therefore built adaptively. This is done by rendering the image several times (each rendering is called a pass) with the rendering resolution being doubled with each pass. The idea is to start with a low resolution (say a quarter of the resolution of the final image) and work up to the final image resolution.”

source: http://www.spot3d.com/vray/help/150SP1/render_params_advancedimap.htm

“The irradiance map is in fact a collection of points in 3d space (a point cloud) along with the computed indirect illumination at those points. When an object is hit during a GI pass, V-Ray looks into the irradiance map to see if there are any points similar in position and orientation to the current one. From those already computed points, V-Ray can extract various information (i.e. if there are any objects close by, how fast the indirect illumination is varying etc). Based on that information, V-Ray decides if the indirect illumination for the current point can be adequately interpolated from the points already in the irradiance map, or not. If not, the indirect illumination for the current point is computed, and that point is stored in the irradiance map. During the actual rendering, V-Ray uses a sophisticated interpolation method to derive an approximation of the irradiance for all surfaces in the scene.”

source: http://www.spot3d.com/vray/help/150SP1/render_params_advancedimap.htm


How to save an irradiance map:

Why save an irradiance map?

Time. It saves time. This is especially true of a series of animated images. Instead of re-calculating a irradiance map for each frame in a series, the renderer can just use one map that is already saved. This speeds the rendering process significantly.

Helpful definitions

Global Illumination = indirect illumination or light rays reflected by other surfaces

Irradiance Map = a storage method for collecting points computed from the indirect illumination

Now that we have map saved to disk, we have to tell V-Ray to use that map. Change the irradiance map mode to From file, click the Browse button and select the file we just saved. Re-render the image. Notice that now V-Ray does not calculate an irradiance map, but skips directly ahead to the rendering.

As a conclusion, here is a basic workflow that can be used to render a static scene from multiple views:

* First prepare the scene (geometry, materials, lighting etc)
* Adjust the irradiance map settings for the required level of detail (e.g. chose a suitable preset) and tune the other render parameters.
* Clear any previous irradiance map from memory in order to avoid weird results
* Set the irradiance map mode to Incremental add to current map
* Render as many views as you need. The first one will be slow, since a full irradiance map will be computed. Each of the next views will be faster depending on how relevant the memory irradiance map is to that view.
* You can save the accumulated irradiance map to a file. That map can be used to render quickly other views of the scene, if required later on. To load the saved map, you need to set the mode to From file, enter the correct file name and render any image. You can then set the mode back to Incremental add to current map and continue rendering other views. If you are sure the map already contains enough information, you can simply leave the mode to From file.

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