Pena Contents
Introduction
Control Pane
Brush Pane
Texture Pane
Effects Pane
Color Picker
Save/Load Pane
Selection Pane
Preferences Pane
Intelligent Canvas
  • Intelligent Canvas Introduction
  • How It Works
  • Creating Effect Areas
    Erasing Effect Areas
    Flooding Effect Areas
    Viewing Effect Areas
    Saving/Loading Effect
    Wacom Bluetooth Stylus
    Jot Bluetooth Stylus
     
    The Effects Library
    Effects Introduction
    Color Source Effects
    Procedural Source Effects
    Color Filter Effects
    Spatial Filter Effects
    Math and Logic Effects
    Special Effects
     
    Artists Gallery
    The Artist Gallery
     
    Pena Support
    Troubleshooting

       

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      The Intelligent Canvas

      Intelligent Canvas Introduction


      Important Note

      Using Surface Effects (Intelligent Canvas) is fairly advanced and requires a good understanding of Brush Effects and the Selection Pane. We recommend learning Intelligent Canvas after you have mastered the other areas in Pena.

      If you are already familiar with those two areas, then please, continue!

       

      This next section outlines the basic functionality of the Intelligent Canvas, or you can view the video tutorial Pena Tutorial #11 - Using the Intelligent Canvas.

      Intelligent Canvas gives you the capability of assigning Effects to areas of the screen. You use the Selection Pane to create selection areas, and then the Effects Pane to set up Effects and assign them to the selection areas.

      You can think of the Intelligent Canvas as being an extension of Selection Masks. As you know, Selection Masks let you specify an areas of the screen that restrict your drawing.

      Using Selection Masks with Intelligent Canvas goes one step further - it lets you assign Effects to those areas.

      Consider the following example:

      In the above image we have created a square selection area on the screen and set it to be a Brick Wall Effect. We also made our Brush Effect a 4-Color Gradient, Fit-To-Brush.

      You can see that as we painted on the Canvas we are painting our 4-Color Gradient as normal, except when we enter the square area at which point we get the Brick Wall.

      Just like with Brush Effects, Surface Effects are setup in the Effects Pane.

      Since you are familiar with Brush Effects, the left half of the Effects Pane you will find Surface Effects, the right half of the Effect Pane, fairly easy to use.

      Effects are setup in the Surface Effect list identically to how you set them up in the Brush Effect list. All the things you learned for Brush Effects apply for Surface Effects.

      Additionally, the Effects you can assign are identical. There are no special Surface Effects that are not also Brush Effects.

      Finally, just as there are 32 Brush Effects possible at one time, there are 32 Surface Effects possible at one time.

      The difference between Brush and Surface Effects are how they are used...

       

      How Intelligent Canvas Works


      The Intelligent Canvas is a special buffer in Pena. It is the size of your Canvas and contains information about each pixel in your Canvas.

      Remember that each Slot in the Brush and Surface Effects list is numbered, 01 through 32 for the 32 Effect slots. This is important because it is the key to how Intelligent Canvas works.

      To specify that an area of the screen has a certain set of Effects, setup the Effects on the Surface side (right side) of the Effects menu, just as you would for Brush Effects (the left side).

      For example, to do our Brick Wall example, above in the introduction, we simply loaded the Brick Wall Effect into Surface Effect Slot #01.

      Next you use the Selection Pane to create a selection mask of the areas of the screen where you want the Brick Wall to appear.

      Returning to the Effects Pane, the lime green mask below the Surface Effects list allows you to transfer the selection mask to an surface program.

      Tapping the lime green mask you would select the Entire Select Area from the Pop Up. This is telling Pena to take your selection mask and create a surface program with it.

      Here is what Pena does... it looks at your Surface Effect list and notes which slots are in use with a Green Check Mark. It then associates all the pixels within the selection mask with those slots.

      Notice that we said it associates the pixels with the slots instead of saying it associates the pixels with the Effects. This is important. If you were to change the Brick Wall Effect to something else, later on, painting will change it to the new Effect. So it is important to keep in mind that the surface remembers the slots, not the Effects assigned to the slots.

      Because you have 32 slots for Surface Effects you can use different slots for different programs and selection masks.

      For example, you could create a selection area and assign Brick Wall to Slot #1 and program it into that area.

      You could then create a different selection area and assign Sky with Clouds to Slot #2, turn off Slot #1, and program it into that area.

      With 32 slots, you can have a maximum of 32 Effects spread on the screen.

      Of course, you can use slots together to make more complex Effects, just like with the Brush Pane. Simply have the slots you want to program set to a Green Check Mark, and all other turned to a Red X, to ensure that the proper program is set into the selection area.

      You continue doing this... making selection areas, setting the programs up, until you have all the areas of interest covered with the desired programs. Then turn all your Slots to a Green Check Mark and start painting. This will use all your programs at the same time.

      As you will learn, you can also merge areas after the fact, adding new programs to existing ones. Likewise you can selectively remove programs from any area.

      Because the selection area is only used to set the programs, once you have the programs set the selection area can be used as normal - to restrict drawing, if you so desire.

      Since the surface buffer is invisible - there are special tools in the Effects Pane that let you visualize the various programs in a variety of ways.

      As we said at the start of this, the special surface buffer holds information about each pixel on the Canvas. You now know that this information is which of the 32 slots each pixel is to access from the Surface Effects. Whatever ones are set, they are executed in order from Slot 01 to Slot 32.

      You may be thinking that the Surface Effects are somewhat limited because they seem to be solid - but that is not the case...

      If, for example, you set the Brick Wall Effect to be somewhat transparent, you would indeed see your brush mixing with the brick wall.

      Another example would be tinting. You could specify that an area of the screen is always to be tinted green. That would allow you to paint in that area, but what you paint would be tinted green:

      Again we have a square as our programmed area with a Modify HSV Effect and Color 2 set to green. We are painting with a 4-Color Gradient brush. You can see that as we entered the square area, the color of the brush was automatically tinted green.

      So the Intelligent Canvas can be used both for opaque solid regions, and also to modify the brush some way in desired areas.

      Remember that by default, the Brush Effects are applied first, then the Surface Effects are applied next. However, that order can be changed in the Preference Pane by using the Draw Surface First icon. Turn that on will cause the Surface Effects to be applied first, then the Brush Effects next.

      You can turn Surface Effects off just by toggling their Green Check Mark to a Red X. Any Surface Effect with a Red X, even if used in the Intelligent Canvas, will not be run. Likewise you can turn all Surface Effects off by tapping the Green Check Mark by the Surface Effects title and turning it to a Red X. Even though the Effects themselves may have a Green Check Mark, none will be used.

      The rest of this section explains how to program, erase, view, and save your Surface Effect programs.

       

      Creating Effect Areas


      The Create Surface Effect Area icon is a combination of a mask, like the selection mask icon, and the textured grey grid. It is this icon that lets you create your Intelligent Canvas surface.

      In order to use this icon you must have the following already created:

      1. A selection mask created using the Selection Pane
      2. At least one active (Green Check Mark) Effect in the Surface list
      3. The master Green Check Mark on for Surface Effects above the Surface list
      If you do not have all of the above, you will see a message asking you to complete those steps first.

      Once you have at least the above three things, tapping the Create Surface Effect Area icon will display the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Entire Select Area - The currently active Surface slots will be set in the entire selection mask area. This replaces any programmed slots that might have been in that area previously.
      • Entire Non-Select Area - The currently active Surface slots will be set everywhere except the selection mask area. This replaces any programmed slots that might have been in that area previously.
      • In areas with no program - The currently active Surface slots will be set everywhere in the selection mask area where there is no existing programs at all.
      • Only on existing programs - The currently active Surface slots will be set everywhere in the selection mask area where there area existing programs, replacing them.
      • Only on the brush program - The currently active Surface slots will be set everywhere in the selection mask area that matches the Brush Effect program, replacing them. This allows you to temporarily use the Brush Effect list to set a program (the actual Effects are ignored, just the active slots are taken into consideration). Your Surface slots will be set everywhere that matches the active Brush slots, replacing them.
      • Merge Select Area everywhere - The currently active Surface slots will be merged with the entire selection mask area. This keeps any original programs intact and only adds the new program slots to the selection area.
      • Merge only on existing programs - The currently active Surface slots will be merged everywhere in the selection mask area where there are already existing programs. This keeps any original programs intact and only adds the new program slots to the existing programs.
      • Merge only on the brush program - The currently active Surface slots will be merged everywhere in the selection mask area that matches the Brush Effect program. This allows you to temporarily use the Brush Effect list to set a program (the actual Effects are ignored, just the active slots are taken into consideration). Your Surface slots will be merged everywhere that matches the active Brush slots.
      Once you have modified your program with one of the above choices, the selection mask area is no longer needed (as it has now been entered into the surface buffer). You can make new selection areas for more programs or to restrict drawing.

       

      Erasing Effect Areas


      The Erase Surface Effect Area icon allows you to remove surface programs from your Intelligent Canvas.

      Unlike Create Surface Effect Area, Erase does not use selection masks - but rather allows you to paint with the current brush, erasing programs everywhere you paint.

      Erase is selective... that is, it only erases the programs you have turned to a Green Check Mark in the Surface Effect list. This allows you to erase some programs, while keeping others.

      Before Erasing, set your current brush to be the size and shape you want. Note that Erasing honors brush rotation, offset, and twist - so be sure to have those turned off or set to how you want.

      Once you are ready to erase, tapping the Erase Surface Effect Area icon will display the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Anywhere I erase - Selecting this choice will cause all existing surface program areas to display as green. Begin to 'paint' on the screen. Painting will leave BLACK where-ever you paint, and it will look like it destroyed your Canvas, however, it is only removing programs. When you are done erasing, lift your finger and the Canvas will look as it did before. Note that only active surface slots (Green Check Mark) are erased. Non-active slots remain intact if they are in the surface buffer.
      • Only on the surface program - Selecting this choice will cause all non-program areas to display in red, with areas containing the surface program remaining normal color. Begin to 'paint' on the screen. You will only 'erase' in the non-red area. It will appear that you are erasing your canvas, but in fact you are only erasing your surface programs. When you are done erasing, lift your finger and the Canvas will look as it did before. Note that only active slots (Green Check Mark) are erased. Non-active slots remain intact if they are in the surface buffer.
      • Only on the brush program - Selecting this choice will cause all areas that do not match the brush program to display in red, with areas containing the brush program remaining normal color. Begin to 'paint' on the screen. You will only 'erase' in the non-red area. It will appear that you are erasing your canvas, but in fact you are only erasing your surface programs. When you are done erasing, lift your finger and the Canvas will look as it did before. Note that only active slots (Green Check Mark) are erased. Non-active slots remain intact if they are in the surface buffer.
      • Not on the brush program - Selecting this choice will cause all areas that match the brush program to display in red, with areas not matching the brush program remaining normal color. Begin to 'paint' on the screen. You will only 'erase' in the non-red area. It will appear that you are erasing your canvas, but in fact you are only erasing your surface programs. When you are done erasing, lift your finger and the Canvas will look as it did before. Note that only active slots (Green Check Mark) are erased. Non-active slots remain intact if they are in the surface buffer.
      • Completely clear the surface now - Note that this choice, unlike the other ones, is not selective. This choice does not let you erase by painting, but rather instantly clears all programs from the Intelligent Canvas. Select this to start with a new, clean, Intelligent Canvas.
      Note that in all the modes above where you can paint, you always paint black - even over areas marked 'red' and 'green'. This is simply to show where you have painted. You are not really painting black, and when you are finished the Canvas will return to normal. Only the Intelligent Canvas surface slot memory is affected.

       

      Flooding Effect Areas


      The Flood Surface Effect Area icon lets you create your Intelligent Canvas Surface by flooding the entire surface, instead of using the selection masks.

      Tapping the Flood Surface Effect Area icon will display the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Replace Everywhere - The entire Intelligent Canvas is replaced by your current Surface Effect program.
      • In areas with no program - Any area on the Intelligent Canvas that has no program will have the current Surface Effect program set.
      • Replace on existing programs - Any area on the Intelligent Canvas that has any program will have that program replaced with the current Surface Effect program. Areas with no programs are left untouched.
      • Only on the brush program - Any area on the Intelligent Canvas that has any program that matches the active brush slots will have the current Surface Effect program replace those programs.
      • Everywhere but the brush program - Any area on the Intelligent Canvas that does not matches the active brush slots will have the current Surface Effect program entered into those areas.
      • Merge Everywhere - The current Surface Effect program will be merged with all programs and non-programs over the entire Intelligent Canvas.
      • Merge with existing programs - The current Surface Effect program will be merged with any area on the Intelligent Canvas that has existing programs.
      • Merge only on the brush program - The current Surface Effect program will be merged with any area on the Intelligent Canvas that matches the existing brush program.
      • Merge everywhere but the brush program - The current Surface Effect program will be merged with any area on the Intelligent Canvas that does not match the existing brush program.
      Once you have modified your program with one of the above choices, the selection mask area is no longer needed (as it has now been entered into the surface buffer). You can make new selection areas for more programs or to restrict drawing.

       

      Viewing Effect Areas


      Because the Intelligent Canvas is not visible it can become difficult to remember where you have setup surface Effects on the Canvas. The View Effect Areas tool gives you an easy way to see what Surface slots are set into the Intelligent Canvas, and where.

      The View Effects Area icon takes into account which Surface slots are active (Green Check Mark) and which are inactive (Red X) but still hold a program. It compares this to what is stored in the Intelligent Canvas.

      When you tap the View Effect Area icon you will get the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Tint active programs in green - The Canvas is dimmed and all Intelligent Canvas areas that match the currently active Surface slots are shown in green. Tap the screen when you are done viewing.
      • Tint hidden programs in yellow - The Canvas is dimmed and all Intelligent Canvas areas that match the currently inactive Surface slots, where this is an Effect in that slot, are shown in yellow. Tap the screen when you are done viewing.
      • Tint missing programs in red - The Canvas is dimmed and all Intelligent Canvas areas that match the currently inactive Surface slots, where the slot has no Effect, are shown in red. Tap the screen when you are done viewing.
      • Tint pure active green, with hidden yellow - The Canvas is dimmed and all Intelligent Canvas areas that match the currently active Surface slots are shown in green, and non-active Surface slots, with Effects assigned, are shown in yellow. Tap the screen when you are done viewing.
      • Tint pure active green, with missing red - The Canvas is dimmed and all Intelligent Canvas areas that match the currently active Surface slots are shown in green, and non-active Surface slots, with no-Effects assigned, are shown in red. Tap the screen when you are done viewing.
      • Tint no programs in orange - The Canvas is dimmed and all Intelligent Canvas areas that contain no program at all are shown in orange. Tap the screen when you are done viewing.
      • Tint any program (hidden, missing, or active) blue - The Canvas is dimmed and all Intelligent Canvas areas that contain any type of program at all, regardless of what state the Effect is in, are shown in blue. Tap the screen when you are done viewing.
      • What Slots are being used in the Surface? - This choice will examine the Intelligent Canvas to see which slots are referenced, you will then see the following Pop Up:

      The Pop Up tells you exactly which slots from your Surface list are referenced in the Intelligent Canvas.

       

      Saving/Loading Effects


      In the lower right corner of the Effects Pane is the Surface Effect Save and Load icon.

      While the Load/Save icon on the Control Pane saves and loads Surface Effects (among other things), the Save and Load on this Effects Pane gives you yet another way to save Surface Effects.

      Use the Save Load icon on the Effects Pane to save and load your favorite Surface Program Effects.

      When you tap the Save Load icon, you will see the following Pop Up:

      To save your current Surface Effects on a new name, tap the top text entry field and enter the name using the keyboard.

      To quickly find an existing Surface Effect, use the blue index on the right to find the alphabetic start in the list.

      To delete a saved Surface Effect, tap the red circle and then the red DELETE that will appear (you can cancel by tapping anywhere in the grey area).

      To load, save, or merge, Surface Effects, tap the name of the Effect and you will see the following Pop Up:

      Tap the Cancel button to dismiss the Pop Up without taking any action. Otherwise the following choices are available:

      • Load This Surface Program - Tap this to have the selected Surface Program loaded into your Surface Effects Slot.
      • Merge Surface Program At Start - The selected Surface Program will be merged before all your existing Surface Effects. Empty slots in the selected Surface Program are not merged, but both Green Check Mark and Red X Effects are merged.
      • Merge Surface Program At End - The selected Surface Program will be merged at the end of all your existing Surface Effects. Empty slots in the selected Surface Program are not merged, but both Green Check Mark and Red X Effects are merged.
      • Merge Surface Program Before 1st Unchecked Slot - The selected Surface Program will be merged before the first Red X Surface Effect in your list. Empty slots in the selected Surface Program are not merged, but both Green Check Mark and Red X Effects are merged. This is useful to insert an Effect between two other Effects in your list. Simply mark the second Effect as unused (Red X) and do this merge and the program will be placed before the second Effect.
      • Save Active Surface Program Here - Your current Surface Effects will be saved over top of this existing Surface Program.
      If the Surface you are inserting won't fit, you will get a Pop Up message telling you of the problem.

       

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