Brush from object is negative inverted.

[Supafur]

So here’s my problem.

 

i tried the following tutorial, teaching how to make a brush from a shape or an object, using the « new intensity brush from texture » and everything worked fine

so I tried to do my own with a VERY simple shape : a circle. I think I exported the png correctly, from selection and without background.

problem is it gives an inverted results : a white circle on a black background. (See file below)

 

Is there anything I may have missed ?

 

thanks a lot already
 

[walt.farrell]

3 hours ago, Supafur said:

Is there anything I may have missed ?

You might show us the PNG you created, but my guess would be that you didn't make it Black on White.

[Supafur]

 Here’s, in order, the one I ended up with and also the one I got through the tutorial. What puzzles me is that it’s a BLACK figure on a white/ blank background in the tutorial, and a BLACK circle on a white / blank figure in my self made one. 
 

Thanks for the taking the time,to answer, btw ☺️

 

[Dan C]

Hi @Supafur,

I can confirm the behaviour you're experiencing here is expected when creating a Textured Intensity Brush - these brushes are created based on the opacity values of the raster image, where any 'opaque' areas will be transparent in the brush, and any 'transparent' areas will be filled with the brush colour currently selected.

Using the 'brush_tile.png' above to create a brush shows the same results as the video tutorial, the black opaque areas become transparent, and the transparent areas are filled with the brush colour, in this case black.

It appears differently for this specific shape as it's been designed with the transparent area in mind, flowing between each 'repeat' of the image - whereas the simple circle PNG you've provided is a closed shape and does not 'flow' between repeats, therefore the result you've shown above is expected with this specific image.

I hope this clears things up

[walt.farrell]

1 hour ago, Dan C said:

these brushes are created based on the opacity values of the raster image, where any 'opaque' areas will be transparent in the brush, and any 'transparent' areas will be filled with the brush colour currently selected.

If I've understood you, then the result we saw in the tutorial is that the brush effectively paints with the inverse of the original PNG pattern. 

So to do the equivalent, we would need to start with an image like this: 

and then we would get a brush that paints like this: 

[Dan C]

21 minutes ago, walt.farrell said:

the result we saw in the tutorial is that the brush effectively paints with the inverse of the original PNG pattern

Yes, that is my understanding of how Textured Intensity Vector Brushes are created in Designer - though the same is not true of an Intensity Pixel Brush, according to the helpfile:

Quote

New Intensity Brush—creates a brush stroke using a raster image, with darker pixels from the image rendered more opaque and lighter pixels more transparent.

So the 'Brush_tile.png' file above will create a 'stamp' Pixel brush matching the PNG exactly, and not the inverse as seen with a Vector brush.

As far as I'm aware, this is an expected behaviour difference between Vector and Pixel brushes