Dear Corel Users
Can you suggest a good way to draw a comet - not using a bitmap glow, but in pure vector on a dark background?
I attach a Photo to show more exactly how it look like ...
Regards,
Erik
Thank you for the explanation Erik
Looking at a visible comet from us on Earth would you still see colors.
Good exercise for all of us in Corel and a good coversation as well,I added some color to my next comet.
Erik Vestergaard said: Actually there often is color! Erik Hello Erik; I see you got a lot of good answers for your question, and OF COURSE there's color with Comet, at least in the US of A, there's Green, Yeloow, Gold and White. lol George
Actually there often is color!
Hello Erik; I see you got a lot of good answers for your question, and OF COURSE there's color with Comet, at least in the US of A, there's Green, Yeloow, Gold and White. lol
George
Regarding colors, I think one can divide it into three phases or steps: a) What light is being sent out or reflected from the object, b) What light reaches the eye and finally c) what is being perceived by the brain.
a) is kind of uninteresting, because a lot of light from the source will never reach us. Some of the light will get absorped by the material which is between the source and the observer, eventually some wavelengthes will absorp better than others. The latter later having an influence on b) and and how you perceive colors in c).
c) is surprisingly kind of uninteresting too from an image viewpoint. Many years ago I studied the Linear Perspective from a mathematical viewpoint. At the beginning I had a lot of focus on the brain and perception in general. I knew that subjects far away is looking smaller than closer objects. It was a real eye-opener when I finally realized that one should NOT try to guess how things is being perceived by the brain in order to make it look realistic. Instead one should try to present to the observer the exact same light - if possible - as the real thing does! The reason is this: If you can create graphics which can deliver the exact same light as the real thing does, the brain will realize it as looking correct/realistic. This is why linear perspective is so smart. The drawing is delivering the same light to the observer as the real thing does: You cannot distinguish between two points on the same line to the eye! Another thing is that you need to choose a plane to map on ...
So from a theoretical viewpoint it is b) which is the most interesting. You can let the rules of Perspective guide you, so you won't be fooled too much by perception. When a person, inexperienced in drawing, is going to draw a scene with people in different depth, he/she will probably draw the persons far behind too big, because the brain compensates - it knows that things far behind is in fact bigger. So perspective really helps as a guide here.
The concept of Colors is however a much harder thing. There is aerial perspective and colors in general. And light reflected from different kind of paper and light emitted from a computer screen are all different. If you were to use b) you would need a physical detector of some kind. This is of course not feasible in general, even to present the same light to the eye. So here one unfortunately need to rely on c), i.e. perception.
This was all very theoretical, but good to be aware of. This discussion made me search after astronomical pictures and found the following pages, which are rather informative:
http://cseligman.com/text/pixnotes.htm
http://www.aao.gov.au/images/general/photography.html
I guess there is no doubt that if you want a realistic view of a comet through a Telescope it will be perceived as close to white. The more black/white Night Vision will take over! It is another case with the blue sky and sunsets, which are much more colored. When making artwork in CorelDRAW is it however appropriate to exaggerate colors to a certain level, I think.
I think I need to go back and practice more with the Mesh Fill Tool ...
NB! I liked the soda can, haha!
hello Erik
I think you can do what you want in CDRaw But you will probably need to convert items to bit map and use some effects the attached is all cdraw vector object with lens, gradient, gaussian blur,.
Background is rectangle converted to bitmap then Creative-particles filter on bitmap menu
Gas clouds are shapes with nebulae texture fill plus transparency.
The Galaxies are ellipse with distort- twister- convert to curve -use shape tool to move spiral arms- gradient fill - bitmap-Gaussian blur, colour is a lens on top
The comet is 5 elements 1. shape with gradient then gaussian blur then apply effect bitmap- art strokes-scraperboard 2. white shape for head - Gaussian blur 3. duplicate first shape apply colour then transparent lens 4. drop shadow using grey for colour then gaussian blur
it doesn't take that long you can add the colour like you photo duplicating the tail adding lens and colour as you wish.
Are you involved in Astronomy?
Ross Blair