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BPR Rendering Workflow in ZBrush 4 R2

By Daniel Bystedt
Web: Open Site
| Your Rating:
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(37 Votes)
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| 4 Comments
| Comments 4
Date Added: 18th May 2012
Software used:
Photoshop, ZBrush

Fog and Light Correction

Depth is always rendered and can be found in Render > BPR render passes (Fig.27).

1534_tid_Fig 27.jpg
Fig. 27

The top layer is a constant color (blending mode Normal) with the inverted depth as a mask. It is a very subtle effect with low opacity.

The lower layer is a constant color (blending mode Normal) where I painted a mask to darken the torso in order to bring out the head visually. The reason for not multiplying this layer is to not reach black in the image. I prefer to have my lowest values around 2-5 in a dark image (Fig.28).

1534_tid_Fig 28.jpg
Fig. 28

The current pass can be seen in Fig.29 and the combined passed in Fig.30.

1534_tid_Fig 29.jpg
Fig.29
1534_tid_Fig 30.jpg
Fig.30

Lens Blur

Time to add lens blur in Photoshop. In order to do this you need to bake/combine all layers into one. We want to keep the order of the old layers so we can go back and do changes.

Combine: Create a new layer on top of the entire stack and press Ctrl + Shift + Alt + E to merge all visible layers into the active layer.

Put depth pass in a new channel: Copy the layer with the rendered depth pass. Go to Window > Channels and create a new channel. Then paste the depth information into this channel and name it "Z" or "Depth" so you know which channel is which (Fig.31).

1534_tid_Fig 31.jpg
Fig. 31


Apply lens blur: Select the combined layer and choose Filter > Blur > Lens Blur. When the new window opens you should choose the channel you created as a source. Photoshop will blur depending on the luminosity in that channel. A good way to choose blur focal distance is to click on the image itself. Radius sets the amount of blur. There are a lot of other variables that you can play with to get the look you are going for. Generally you should apply a bigger amount of blur if the camera is really close to your model (like a close-up on a flower or bug) (Fig.32).

1534_tid_Fig 32.jpg
Fig. 32

Fig.33 shows the model before the lens blur and Fig.34 shows it after.

1534_tid_Fig 33.jpg
Fig.33
1534_tid_Fig 34.jpg
Fig.34





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Readers Comments (Newest on Top)
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(ID: 222985, pid: 0) Piotr on Sun, 06 October 2013 4:49am
This was exactly what I have been looking for since couple of years ago. Thank you
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(ID: 199980, pid: 0) Vlad on Tue, 28 May 2013 11:42pm
Unbelievable amount of work! Really great job! and thx a lot for the walkthrough.
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(ID: 185977, pid: 0) Luis B on Mon, 11 March 2013 8:04am
Thanks a lot for the effort in making this tutorial. I love the character design and the final result is great. Truly good stuff.
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(ID: 153180, pid: 0) Naky on Sun, 30 September 2012 12:31pm
Thank you for showcasing your process in Lighting & Rendering... Just one question i have been facing since i started using Z brush is when you use BPR how can i export the image with a mask on the creature or the sculpt?... I mean creature separate & BG separate !
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