In photoshop someone change the shape of a brush tip from a circle to a rectangle or any other pattern. How can I do that in Corel Painter 2021?
You're looking at Dab options, specifically custom dabs. Because Painter focuses on what it considers to be matter of art, dabs are on a per-brush basis, and it doesn't come with a standard set like GIMP or Photoshop that are swapped out for each brush, although you can import Photoshop brushes as such (without their various custom settings or their names due to it being a proprietary format whose specs they don't publish).
Definitely possible with Painter 2021. You can either find a brush tip shape that you like, and modify the brush accordingly or create your own shape. Here are the steps.
Before you begin, first determine which is the brush you want the new tip for. It is a blender? A watercolor brush? An oily brush? I recommend finding the brush that has the correct behavior and media, and then modify the tip.
First approach: Capture a dab
1. Create a new document, I'd recommend around 1000px x 1000px
2. Using the various brushes, paint the shape you want your dab to be on canvas. Alternatively, you can use "File > Place" to bring in other images, just make sure you use Ctrl/Cmd+E to drop them to the canvas. Note that all 'white' areas of canvas will be treated as transparency.
3. Once you have your dab image ready, select the brush you want to modify the dab shape of.
4. Choose Menu > Brushes > Capture Dab
5. Create a new document to test the dab...is it one you like? If so, choose Brushes > Save variant.
Second approach: "Transfer a dab"
There is a way to see what other brush shapes there are in Painter and then either modify the brush or transfer the dab. This approach tends to require more more advanced knowledge of Painter. For example if the brush has the behavior you want, this should work out nicely...however if you find a brush that has a right shape but the wrong behavior, that can be a little tricker. Let us know if this is the approach you plan to take, which brush you like the shape of and which brush you want the beahvior of and I'll provide instructions on how to "transfer the dab".
Here's how to browse the existing shapes in your currently selected brush library:
1. Go Menu> Window > Search.
2. Type "Captured" as a search term and press enter.
3. Scroll thru the list, and see if you like one of the shapes.
4. Let us know if there is a brush that you like the shape of, and let us also know which brush you want to 'match' the behavior of and we can help you out.
Lastly, you can try the ABR import option, which is also quite advanced...so again, let us know which brush behavior you are enjoying as that will impact where we go next.
Thank you. I didn't know that the "captured" bit showed up in search since it wasn't directly in the name. I'm guessing there's a bit of keyword search involved.
Yes, there are some neat tricks in the brush search! For example, search "GPU" to find all brushes that can leverage your GPU to accelerate brushing. Another neat trick is to search by brushes that support certain layer types, like "TP" for Thick Paint, "WC" for watercolor, "LI" for Liquid Ink, "G" for brushes that use Gel mode and "D" for default layer.
I also occasionally search using the names of the brush engines...for example "rendered" and in this case "captured".
This was some good info. I did a search using the word "Captured" and found that there are many more Captured dabs in Painter than I previously realized. This opens up potential. For example, through my search I found the "Real Watercolor/Fractal Wash" brush - I liked the dab. I then changed the Stroke type in the General panel to "Glazing" and turned this into a brush that is more to my liking. I'm going to do more exploring with this process.