Yes, hit S while in Texture Paint mode. If you want to Color-Pick from the Screen Data (like other apps), check "Sample Merged" in the popup window. 

That's a Blender thing, set your View Transform to Standard inside the Plugin or in the Render panel.

This happens when you add additional objects to the MattePainter collection. Just move them out to their own space :)

You can, but the images won't move with it. To fix this, select all the images in your MattePainter collection, then your Camera and hit Ctrl+P. Be careful moving the camera too much since we're working with 2D Planes.

This is intended behavior. When Blender creates a new Image Texture, it fills it with Black. Black = Transparent for Alpha Channels, so your image will be invisible. This is where we jump into Texture Paint mode with a White colour, and start painting our image in!

This is actually a Blender limitation. Be very careful when tabbing out of Texture Paint mode and hitting Undo. Alternatively you can hit Save All to ensure your images are saved.

Increase your Cycles Layers value until they go away. By default Cycles only renders up to 8 transparency passes.

Not currently. It’s definitely something we’d love to implement at some point!

You might have some unlinked data blocks interfering with the node setup. Click “Clear Unused” and then duplicate your asset again. 

Edit -> Preferences -> Add-ons -> Install. Then double click on the ZIP. You’ll now be able to find it in your addons list to activate it (click the checkbox to activate).

• If you combine your painted Transparency layer and the image's original Alpha channel with a MixRGB node, then put that through a Math Node set to Multiply with a value of 2 (so MixRGB x 2), it should combine them correctly.

• MattePainter doesn't handle this automatically because (as far as we know) there isn't a way to detect if the imported image is a .PNG or a .JPG.

Photobashing is a common final (or near-final) step during the Digital Painting process. It involves rendering out an image from a 3D Renderer such as Blender Cycles, then bringing that image into Photoshop and "painting" images over it using transparency masks to add additional last-minute details.

Set your Transform mode to View and jump into the Camera View. Now your axis will be relative to the Camera (X for Horizontal, Y for Vertical, Z for Depth). We recommend working in this mode while using the Plugin.