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Painting Theory

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Carlos Ninè</br>An Argentinian Master - CTN TV. [translation]LINRAN's Light and Colour Tutorial + Mini tut. Let’s Learn Math: Photoshop Blend Modes. One of the best features of Photoshop is the layer blending modes.

Let’s Learn Math: Photoshop Blend Modes

They allow you to create spectacular effects with little to no effort. I’ve been taking a closer look into how Photoshop handles the blending of layers (especially the math side of it). Each of the blending functions (modes) takes two inputs (a top layer, top in the math, and a bottom layer, bottom in the math) and yields an output (or product, r in the math). Below are the layers I used to test: You’ll notice a little variance between the output (the gradients do not match up perfectly). Some of the functions isolate individual channels (r = 0xff, g = 0xff and b = 0xff) while others deal with the color a whole (rgb = 0xffffff). Some of the functions require the channel values to be normalized—meaning that rather than being a value from 0-255, it must be a number between 0-1. Public static double normalize ( int col ) { return col / 255.0; } Normal Edits or paints each pixel to make it the result color. Math r = top Code Darken. Using Blend Modes in Photoshop.

Article and Photography by Ron Bigelow Photoshop CS or Photoshop CS2 Used in this Tutorial Linear Burn Blend Mode.

Using Blend Modes in Photoshop

Mateusz Piaskiewicz's Blog - Composition in Level Design. The following blog post, unless otherwise noted, was written by a member of Gamasutra’s community.

Mateusz Piaskiewicz's Blog - Composition in Level Design

The thoughts and opinions expressed are those of the writer and not Gamasutra or its parent company. Originally posted at: Knowledge Base. Tonal value. Painters do not have the apparatus problems of a photographer, but they do face a similar value design problem: anchoring the middle value of a painting in a way that communicates the intended feeling of light or dark without sacrificing a complete representation of the tonal range.

tonal value

Our visual system naturally adjusts to the average luminance in our environment to produce the best visual representation. Because this adaptation also affects the appearance of any physical gray scale, the key to the value design of a painting lies in the distribution of gray values across the luminance range. What should this distribution look like? The diagram at right shows a basic value plan that can serve well in thinking about the value range of any painting.

Creating a Value Scale (Grayscale). 1. A naive value scale The total range of light adapted visual response is bounded by a roughly 100:1 ratio between the darkest and the lightest luminance, so this applies to the scene as well as the painting. 2. Head Drawings, Oil Sketches, and Quick Poses - Page 12. Gesture Drawing Notes Thank you for all of the support.

Head Drawings, Oil Sketches, and Quick Poses - Page 12

Here's is a lecture on Gesture Drawing. I've wanted to write down my conversations with students for a while. This pretty much my first day lecture on setting up gesture drawings and the function of the time constraint. Photography Tips, Essential Skills, Quickly Transform Your Photos, by Karl Taylor. Light and Color. Table of Contents Back to Index Introduction This tutorial is about color, which is no doubt a very important aspect of computer graphics.

Light and Color

First is explained how light is built up and why we actually see different colors. Then a some color models are explained: first the RGB color model used by computers, and examples showing how to do color arithmetics in RGB, and then the more intuitive HSL/HSV models are explained. Then code is given that allows you to convert between color models, for example to allow a user to pick a color using the HSV color model and then convert it to RGB so the computer can use it, or to create rainbow gradients, or to change the color of images.

Light Before starting about color models, it's important to know how the human eye and brain turn light into color. Light itself is an electromagnetic wave. Monochromatic light is light made up of one single pure frequency (this is certainly not the general case, most light you see is multichromatic).