Sep 24, 2010 3:37 PM
Perplexed by gradient mesh
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I have used gradient mesh along time. Usually it does exactly what I want it to do so I never questioned how it worked. Today, I was working on a project and I can't seem to get the mesh to do what I want.
So I went out to do some research and I can't seem to find information on this topic anywhere. It seems almost mystical. So if there is a great resource that explains the logic behind how Illustrator choose the start and end point of a mesh line, please send it to me and I apologize in advance if this info is easily found.
Here is my problem. I have a curve. If I click into the curve where I want a mesh line, the mesh line doesn't follow the shape of the object.
Here is my shape
When I use create gradient mesh, this is the mesh that I get. My question is why didn't the mesh lines follow the curve of the object. The first two columns are fine but the last column is totally messed up. Why did it choose to use the points on the outside of the curve instead as the end points? I get similar results when using the mesh tool.
As far as I can tell there is no way to change this once the mesh is created. You can't delete an end point and you can't move it without totally rebuilding your shape.
I created a simplified shape with less points and it did the exact same thing.
Does anyone have any help or advice on this topic. I don't understand why you aren't able to control where the start and end point is of a mesh line when you use the mesh tool. How does it choose a start and end point? This just perplexes me. It just seems random to me but I am sure that is just because I haven't figured the pattern yet.
I have 1 rule when creating mesh objects.... Always start from a standard shape - rectangle or ellipse.
For some reason, results are really odd when you simply try and apply a mesh to an abnormal shape. However, if you start with a standard rectangle, add the mesh, you can then alter the mesh into any shape and when you add more mesh points they act exactly as expected.
You have an uneven number of anchor points per segment and in addition, I woul assume that those redundant points that are close to each other on the left and loweer segment have a different tension setting then the immediately neighboring ones, throwing the tools off track. Removing those points and checking the tension of the corner points might actually make it work as expected...
Mylenium
I guess even many Gradient Mesh veterans didn't know about the approach moluapple is demonstrating above.
Valuable pointer, moluapple.
I only rarely do gradient meshes, but thanks for sharing this tip. Might come in handy. ![]()
Mylenium
This is the same sort trick as you use when making blends.
Only select important/corresponding anchor points.
In older versions of Illie it was the only way.
Moluapple clearly stated the proper technique for accomplishing what the OP needed to accomplished and enriched us all with this knowledge.
It is no trick just the proper way of accomplishing the task at hand. I certainly did not have a clue and now I know.
Thanks moluapple.
For trick read technique.
Yea this is exactly what I was thinking but I tried this. I even removed all points but the corners and when I created the mesh it recreated those points end points on the bottom of the curve. It just seems completely random.
That worked beautiful moluapple. Wow that is exactly what I was looking for. Worked beautifully.
Select these 4 points with White Arrow Tool before you move on to create gradient mesh
Which 4 points ? How do you know which 4 points ? What if your shape has more then 4 points ?
I tried what moluapple suggested by selecting all the points on my shape, which contain more then eight. I wasn't able to get the gradient mesh line to follow the shape ?!?!?!
moluapple, that rocks. how has that been left out of every tutorial and article i have read on the gradient mesh?
strongbeaver, i would assume that you would then have to start with a regular shape. if you have eight sides, you would start with an octagon. of course without knowing what kind of shape you are trying to make i'm not sure if there is a better way or not. but i have used octagons with gradient meshes before and it worked out fine.
also, she selected those points because they are the corners. you dont want to selct the points that are just defining the path. the corners are what is important.
how has that been left out of every tutorial and article i have read on the gradient mesh?
Guess the reason is pretty simple: Almost no one did know it.
Plus, as far as I can see, it has never been described in the official AI documentation.
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