Whites often are mixed with a different oil, walnut or poppy oil, as they are less yellowing than the linseed oil. Most artist quality paints are mixed with cold pressed linseed oil. Oil paints are made by mixing ground pigment (the colour) with a drying oil. Oil paint – for this series of demonstrations I will be using Artist quality oil paints.

They dry slowly, and for portraits time is essential. So where do you begin? A Step-by-Step approach Materials One wrong brushstroke can cause a subject to suddenly look ‘wrong’, panic sets in – your pencils get sharpened, charcoal out and you don’t come back to painting for a while.īut you don’t want to draw anymore, you want to paint. If you are new to JuMP you may want to skip or briefly skim this tutorial, and come back to it once you have written a few JuMP models.Portraits can seem like the toughest subject to crack and you can easily be disheartened by your efforts. It's in the 'Getting started' section to give you an early preview of how JuMP makes it easy to structure larger models. Design patterns for larger models is a more advanced tutorial that is aimed at users writing large JuMP models.Performance tips contains a number of important tips on how to improve the performance of models you write in JuMP. Julia has a reputation for being 'fast.' Unfortunately, it is also easy to write slow Julia code.

If you are new to JuMP and Julia, start by reading them in the following order: ' tutorials are basic introductions to different aspects of JuMP and Julia. Having a high-level overview of how this part of the documentation is structured will help you know where to look for certain things. The purpose of these 'Getting started' tutorials is to teach new users the basics of Julia and JuMP.

Solving a problem using MathOptInterface.

Optimal control for a Space Shuttle reentry trajectory.

Sensitivity analysis of a linear program.

Jump paint tutorial