Yep. The image needs to RGB (or indexed) with no alpha.

Another side note, I tend to get smoother results with environment maps when I set the bump curve to linear and the depth low, like all the way down to 0.01.

Thanks Rob.
It takes a selection or an object on a transparent layer (also works on channel layers), and gives it a sort of an offset gradient depth. Here is an example in PS.

Here it is after running 3 consecutive times. It doesn't have an interface dialog by the way.

Here's another result utilizing an enviromap, with a bit more bevel from the bump.

Now Tux that is sharp.

This is amazing right down to the minutiae of detail.

okay, i finally got it to work, still not sure what i did

what does the environment map actually do, overlay the texture or is it something like gradient mapping ?

because this is my result, with 50ies grey text and the envorinment map enabled (kind of ugly)


and this is lighting effects directly on the environment-map pattern (better but different)


and number two with some colored lights added

Here are a couple of explanations of environment mapping..

http://web.cs.wpi.edu/~matt/courses/cs5 ... e/env.html
https://en.wikipedia.org/wiki/Reflection_mapping

This is linked from the GIMP docs.
http://www.home.unix-ag.org/simon/gimp/golden.html

Here are my results of environment mapped text, with additional lighting added.

WOW

thanks for the links GnuTux !

and nice stuff you posted !
they all look very elegant

Thanks, Esper.

I've played around with the environment mapping feature a good bit, with mixed results. The lighting filter's implementation of em is basically undocumented, so we are stuck with figuring out exactly how it works, and what capabilities it has, on our own.

I don't want to hijack this thread more than it already has been , so perhaps we should start a new thread on environment mapping, so we can discuss our experiments, post our results and get a better feel for it's capabilities. It can map any image onto a surface, with the distance slider, the material tabs and the size and type of the environment map image seeming to be the major factors in determining the results, with the direction tab not being a factor at all. I think more experimentation is necessary, specifically with how it interacts with the bump map and the other options in the lighting filter.

Since Rod renamed this thread and doesn't consider it hijacked, I'll just continue to post here.

I got this interesting effect using an environment map of a pattern. To keep the pattern from being sized way up when it was mapped, I increased the map to 4x the size of the text image.

You're pretty good at this gimp thing, Tux. You should look into owning a website or something.

Well, thanks Mike but as it turns out, this was surprisingly easy to create. Heck, everything I learn is from the excellent members of this site.

Here is another test result environment mapping a pattern. This emap is an image 4x the size the text image, filled with a wood pattern. Bump map Gauss blur 15, Sinusoidal curve, Height .02 - Distance .547 - Material Shiny at .54.

Very nice work Tux....you are on a roll.

Thanks, Molly. I think I'm starting to get a better handle on how to tease out the results I want using the environment mapping feature of the lighting effects plug-in.

Gonna start working on using gradients in the environment maps next, then I'll automate the processes in a script.

Here are my gradient results. Gradient environment map is 30px wide and same height of image/text. Bump map linear with .01 depth.

Very nice tux they really show up nicely on that background

Those are great! Sky landscapes work exceptionally well to produce a chrome look.