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GIMP/GL QuestionsHow to create emaps SOLVED (Showcase | Slideshow)

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RJKD

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How to create emaps SOLVED

Post#1 by RJKD » 03 Feb 2017, 20:31


I'm trying to create emaps similar to the ones below posted by GnuTux at http://gimpchat.com/viewtopic.php?f=12&t=9677 I've been at it all day and am no nearer to when I started, can anyone help me please? :hammer_head:
HDRi3.png
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HDRi1.png
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Last edited by RJKD on 04 Feb 2017, 12:34, edited 1 time in total.
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Post#2 by tim » 03 Feb 2017, 20:51


Sorry I don't know much about emaps.
Maybe someone else will chime in.

EDIT: couldn't you just use map object - sphere to come up with a hacked version of emaps?
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Post#3 by oldmangrumpy » 04 Feb 2017, 00:19


RJKD - firstly let me state that there are many better 'emappers' in the forums than me. Secondly, I do not believe there is a 'silver bullet' approach, but yes there are several scripts/filters that produce spheres. Yes, GnuTux was able to produce stunning shiny emaps and I can only aspire to that level of excellence.

However, as I was on a similar emap mission yesterday, let me just precis what I did to get the emaps and example images below.

1. I used a selection of night time photos from Circular quay in Sydney
2. I cropped them all to 800 x 800 pixels
3. I used Filters>Map>Map Object and in the Options tab I set 'Map to Sphere' and 'Create new image on'
4. I turn off 'Show wireframe'; I turn on 'Update preview live'
5. Then in the Light tab I play with the 'Light Settings' and 'Position' options to my preference
6. Again in the Material tab I play with the 'Intensity Levels' and 'Reflectivity' options again using the preview to get my preference
7. Then in the Orientaion tab I typically do not touch 'Position' X or Y but I do normally set Z to 0.8
8. Then I tend to play with various values of X, Y and Z in the 'Rotation' option, again to obtain my preference. This really can change the end result.

After I have then created the spherical image, I may play with Brightness/Contrast and or overlay a colour or gradient.

Voila.

Hope that is of some use to you. The images below were just quick demo selections.
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rjkd_emaps_circquay1.png
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rjkd_emaps_circquay4.png
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omg_map_circquay1.png
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omg_map_circquay2.png
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omg_map_circquay4.png
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RJKD

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Post#4 by RJKD » 04 Feb 2017, 13:04


Thank you OMG, really appreciate that. I trawled the internet trying to get information to help me understand maps in general and it's difficult, there's seemingly no 'bridge', - let me explain...there is -
a) Shed loads of step guides (how to) = little learning curve
b) Advanced (tech speak) = steep learning curve
For example, working through Draconian's Metal Wurx tuts - Frames - step 9 "To smooth it out a bit, lock the alpha channel on the Frame layer by ticking the little box at the top of the layers dialog, and go to Filters>Blur>Gaussian Blur but this time use 7 for both settings then click OK." I thought "why am I locking/unlocking Alpha, what am I actually doing? (no criticism of Drac's tuts, they among the most educational I've found anywhere).
When I find answers, by the time I've looked up what certain words mean, I've completely lost my chain of thought. I accept this is mainly to do with coming to technology so recently and not having engaged with any active learning for decades.
You guys here and at Gimp Chat are a lifeline in this respect, I love using Gimp and I'm very grateful for your patience and generosity. :gimp:
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