V-Ray Image Post-Processing in Photoshop

7/23/2019 V-Ray Image Post-Processing in Photoshop

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V-Ray Image Post-Processing in Photoshop

Image Post-Processing in Photoshop by Teofilo Pardo

This tutorial has been designed for those people who are not using Photoshop as much as they should in their post-

processing workflow or not using it on a regular basis. It incorporates lots of hints and tips and shows what can be done in

the post-processing of a V-ray output image of a SketchUp model. It could also be an output image from any render engine

that you want to tweak and improve. So here we go!

Step 1.Lets open the rendered output image in Photoshop.

Generated by Foxit PDF Creator Foxit Softwarehttp://www.foxitsoftware.com For evaluation only.


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Step 1

Step 2.Go to Image>Adjustments>Brightness/Contrast.

Step 2

Step 3.Now the brightness and contrast would be different in every image, and its a personal choice how much brightness

and contrast you want to apply, because m aybe this im age looks too bright on some monitors or too dark in others. Maybe

you want to have very dark shadows, so you have to experiment with it. In the end, its your eyes that decide.



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Step 3

The result of those first adjustments.

Result of first adjustments

Step 4. Next go to Image>Adjustments>Hue/Saturation.



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Step 4

Step 5.Choose -13 in Saturation because in this case I think the colors are to strong. Again this is a personal choice to use

it or not, I use it sometimes depending on the render.

Step 5

Here we have the result of adjus ting the saturation.



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Result of adjusting the saturation

Step 6.Next go to Image>Adjustments>Selective Color.

Step 6

With Selective Color you can adjust any color on your image. For example if you choose green, all green colors will be

affected and changed depending on how you adjus t the cyan, magenta, yellow and black. So this is a nice option to

experiment with.



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Selective color

Step 7.For this particular image at this stage I chose Neutrals and adjus ted the cyan to -7 and yellow to +9, to correct the

color of the scene. This can als o be done with the color balance option by going to Image>Adjustments>Color Balance, but

found this method quicker and easier. The colors you can get can give you some interesting and dramatic effects with the

color in your image.

Step 7

In these two im ages you can s ee two effects achieved by this method. A blue cinematic effect and a green effect. This all

helps to give an artistic touch to your renders. It all depends on what you are looking for and trying to achieve. Please note



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that this can all be done with the Photo Filter option by going to Image>Adjus tments>Photo Filter, but this method gives me a

little more control on colors .

Effects achieved by this method

The end result.

End result

Step 8.Now lets go to Diffuse Glow by selecting Filter>Distort>Diffuse Glow and apply a little to this image.



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Step 8

Step 9.Choos e 2 in the Glow Amount, but you can go crazy and make it 3, 4, 6, 7 etc its up to you.

Step 9

The end result.



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End result

Step 10.Here comes an interesting part. Go to Filter>Distort>Lens Correction.

Step 10

Step 11.I always us e Chromatic Aberration and its a very interesting option because it gives a very photo-realistic touch to

the image. Again, how you use it depends on what effect you want for your image. In this case I chose -15 on Fix Red/Cyan

Fringe and +9 on Fix Blue/Yellow Fringe and again you can go crazy and play with the adjustments to get a lot of different

results.



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Step 11

Step 12.The Vignette option below Chromatic Aberration is also an interesting one. It can give a deep effect to your image. In

this case I chose -25 and what this does is give us a dark shadow to the perimeter of the image. It gives a feeling of some

kind of shadow frame for our main focus objects, which are the flower and the table. You can also move the midpoint to sui

your needs if necessary.

Step 12

The end result.



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End result

Step 13.Now lets move on to the Blur Tool it is the one circled in red. What this tool does is give us a depth of field effect

(DoF). Now there are plug-ins out there that will do this and I dont want to go into them now and anyway this is a nice easy

method. You can us e it if you don t want to do DoF in V-Ray.

Step 13

Step 14. Now you have to adjus t the Master Diam eter and the Hardness which I almost always leave at 0% and the further

the object is the more blur we will apply (well in this case at least), it all depends where your main focus is ,in this image i

is the flowers and the table.



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Step 14

Step 15.As you can see I applied the Blur Tool to the black couch, a little on the rug and some more on the door to the right.

Next I need to apply it to the red chair (tip: to change the Master Diameter and the Hardness, just right click with the mouse

when us ing the blur tool).

Step 15

Step 16.For the red chair lets use the Zoom Tool, circled in red. I can be more accurate when applying the Blur Tool to the

red chair and not accidentally apply it to the flowers.



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Step 16

Here is the result after applying the Blur Tool and remember to use the Zoom Tool for little areas.

Result after applying Blur Tool

Step 17.Let us use the Photo Filter option by clicking on Image>Adjustments>Photo Filter. This is a very good option for

blending an image to a warm or cool color.



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Step 17

Step 18.In the Photo Filter Window by default appears the Warm Filter with 25% Density. You can change this by clicking on

the little drop down menu and you will get a selection of preset filters. You can als o click on the color box and create a filter

with the color you want.

Step 18

The result with the Warm Filter.



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Warm Filter Resul t

Here are some examples of different filters.

Various filters



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Post-processed image-1 and the s traight V-Ray render

In the image below I used Smart Sharpen, adjusted Brightness /Contrast and added m ore Vignette and Chromatic

Aberration. And the straight V-ray render for comparison.

Post-processed image-2 and the s traight V-Ray render

I hope you enjoyed this tutorial and m ost of all that it has been helpful in your post-process ing work-flow.

Teofilo



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Final Image


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V-Ray Image Post-Processing in Photoshop