A lot of the techniques used in creating a character are similar so yes one skill set tends to help another.
You can find good painting tutorials on lynda.com, i suggest you tutorials about Corel Painter, it is software specially developed for painting but you can find and painting tutorials for Photoshop on the same site.
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Archie Musick has written: 'Oil painting for beginners' -- subject(s): Painting, Study and teaching
Photoshop is used for photo editing, touching up images, digital painting and drawing, concept art, matte painting, and creating textures for 3d models. Photoshop 7 is probably not used for much now, I don't think anyone would still use it professionaly, it's a pretty old version.
Judith Armbruster has written: 'Sumi-E Painting Lessons for Beginners'
Yes as long as you gain a photo at hi res of the painting or can scan it in at least 300DPI
Photoshop, for example, takes up quite a bit of space on your computer.
The programs used are photoshop and painter. For information on how to do it, I typed "speed painting tutorial" and found several excellent sites. I have provided the link to one of them.
Lasso Tool for selections, Pen Tool, Pencil Tool, Brush for drawings and painting.
Photoshop, once practiced and experienced, is a very successful tool for digital painting. It is difficult to ''paint'' with a mouse, so most serious digital artists use tablets, which act as a virtual drawing pad that attaches to your screen. I have both Photoshop and a tablet from Wacom, and I find it much easier than using a mouse. It's actually pretty fun, and just like using pen and paper. The tools within photoshop allow you to create the same details and effects as you would in real life.
No. Jack and Rose are fictional characters.
Color Replacement Tool you can use to replace existing colors on image with Foreground color by painting with brush.