Colour channels ?

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Permalink Reply by Render Plus on November 24, 2010 at 11:49am

You may be able do some of this with Piranesi output. At least changing the colours of materials after rendering - but not reflections.

Also, we may be able to find away to do this. (We can identify the original material of every rendered pixel. So we could do some material based color adjusting.)

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Permalink Reply by Boothy on November 24, 2010 at 12:15pm

Thanks I like to keep you busy ! This would save loads of render time

Boothy

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Permalink Reply by Render Plus on November 27, 2010 at 6:16pm

This might work quite well.

Here is a rendered image with a fabric pattern on the wall.
(I intentionally included a reflective floor and a mirror, to show the situations in which this doesn't work well)

This is the rendered scene with "Color Channels" applied to the wall material:
Of course, the reflected colors do not change, which doesn't work well for this model.

This is the same scene with the fabric color actually changed. (I changed the fabric color in SketchUp and re-rendered)
Of course, the reflections of the colors are changed as well. And also, some lighting effects on the back wall.
However, there will be some situations where color changes like this will work well.

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Permalink Reply by Boothy on November 28, 2010 at 4:21am

This still is promising - I would find this useful - would just have to be careful with floor \ wall finishes etc

Any chance of a beta version to play with ?

Boothy

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Permalink Reply by Render Plus on November 28, 2010 at 6:49am

I'll post something as soon as I get a little more done. However, what you see here is a "proof of concept" that lets s know it can be done.

(This example was "hardwired" to set the color to RGB(200,50,50) - just so I could see the color change work. I need to add a dialog to let you move the RGB sliders. Also I want to be able to browse for an image, and grab the "average" RGB of he image to set the RGB of the rendering.

I posted an example which had some problems because of reflections as well as reflected lighting. I'll post a better example next where everything works better. (Based more on our Office Furniture models)

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Permalink Reply by Render Plus on December 3, 2010 at 2:05pm

Still working on releasing a Beta test version.

I changed the name from Colour Channels to Material Channels (so i wouldn't have to figure our how to spell color. )

I'm pretty excited that this works well for glowing images as well - to let you adjust the intensity of the glow.
(See final image in this post. Where I used Material Channels to lower the luminance of the material applied to the CRT screen - which had a 20% glow. The lower luminance is below the blue line.)

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Permalink Reply by Boothy on December 3, 2010 at 3:23pm

Looking good

I cannot wait - I am working on a series of renders this weekend beacause the client requires same image with different COLOUR walls so I have have to render twice - will be a big boost

Thanks

Boothy

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Permalink Reply by Render Plus on December 3, 2010 at 3:29pm

We almost were ready to create a new Beta today - but we decided to wait until Monday.

Sorry...

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Permalink Reply by Richcat on December 3, 2010 at 4:03pm

Hi Al
Just "thinking out side if the box"
Is there no way to do the same with the light channels and add a colour changing option them as well?

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Permalink Reply by Render Plus on December 8, 2010 at 8:03pm

You can test material channels with the latest Beta Test Version

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Permalink Reply by Render Plus on December 8, 2010 at 8:22pm

Richcat said:

Hi Al
Just "thinking out side if the box"
Is there no way to do the same with the light channels and add a colour changing option them as well?

Theoritically this could be done. I placed the bulbs red, green, and blue in about the same position and in different lighting channels. (This would be the same as applying three lighting channels to a single light). I was able to adjust the tint of the overall light by adjusting the three channels.

If Roy would give us 8, 16, or 64 more channels, (unlikely), the we could assign multiple channels to each light.

All colors on:

Red channel made more intense:

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Permalink Reply by Christopher Alan Krupp on December 9, 2010 at 1:09pm

Al:

Is the material channels available in the latest Beta Version?
I'm with you (as I suggested in the past) that we need gobs of lighting channels
Speaking of which, why are the channels 0-7 in the setup and 1-8 in the render channels?????

Chris

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