Effect of normal map

[Hamilton]

Going by your example, it would be like this:

[Flapman]

You Rock!!!

Now in theory this really could be used as a template and the default emit map could be set to all black until you needed one.

[Hamilton]

Thanks.

I found a good article on the Ogre3D Wiki of using Glow effects. I'm making another thread for it as I figure there is going to be some things to iron out to make it work with the MV Client.
_________________
Sign off,
Hamilton

“We used to dream about this stuff. Now, we get to build it. It's pretty neat." - Steve Jobs

[lorenze1]

Cool
In addition
http://www.ogre3d.org/wiki/index.php/Normal_AO_Specular_Mapping_Shader
and about parallax

[url]http://www.ogre3d.org/wiki/index.php/PerPixel_Lighting_With_Offset(Parallax)_Mapping[/url]
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Gott mit uns.
Sibi imperare maximum imperium est

[Flapman]

Thanks guys,

I went ahead and bookmarked the Orge Wiki Site for reference.

Ham, I'll look forward to that thread too.

A

[Hamilton]

[Hamilton]

[Hamilton]

The following code may help to bring more out of the Normal Mapping. However at this time I have not tested it as the machine I'm working with does not support 2.0 Shaders (it is a laptop only for productivity). I'll try it out later, but if anyone wants to take a shot of it today...


In the DiffuseBump.cg file (in the GpuPrograms folder), search for the Fragment Program you are using for the given model.
Example (copy one of the following below that you are using and paste to Find it in the file):
CompoundPS_20_N
CompoundPS_20_NS
CompoundPS_20_NSE

Then Search for the following code:
It should be located right after the first brace "{"

[Hamilton]

I ran several different tests with the Normal Equations posted above and found very little if any difference. I'll post some of the results later in the day.

There is also a problem with the Emissive Fragment Program (CompoundPS_20_NSE), which even when using a mostly black texture file will still cause the mesh to become lighter (less shadowing effect). When making a correction to an equation, the whole mesh, save for the areas to glow, turns black. Seems that in order for Emissive to work properly on a complete mesh, that both the texture file and code need some work.

As of right now, the correction of the code (CompoundPS_20_NSE) is done as follows:
Original

[Flapman]

That is pretty interesting. So as I can see from what you are describing, unless there is a need for glow, stay away form it....kidding.

In any case, no need to include emissive in the master texture file unless it is really needed right?

Thanks for testing all this.

[Hamilton]

Well I thought I would get those images put up about a week ago, but wanted to get a shader without using the Normal Map to work properly. I thought it would just take some hours, not a week... well minus other interruptions in life. Now that has been figured out, I will be getting those images up shortly.

Some notes:
- Getting the Normal to have more effect/impact looks like it will require more use of lights and render passes. This would improve the quality but will degrade FPS (frame per second). I'm putting together a three light with two pass shader based on the Parallax example to see if that will improve things.

- The problem with the Emissive mapping of making the model lighter can be solved in two manners it seems. Either by using a black overlay in the photo/image editor of about 25% to 33% for the emissive texture or adjusting the following equation to produce less color:
Original Code:

[Hamilton]

Provided below are some screenshots I took while dealing with those shaders. Hopefully it will provide some help. The images below are thumbnails to avoid slowing down these forums. Just click on the thumbnail to view the original image.

Note: Shininess is set to 25 for all images

Reference File:
This is the Default Software Shader to be used as a Reference for the rest.


Original Diffuse and Normal Shader:


Modified Diffuse and Normal Shader:
This is changing the equation of the Normal to use double and SQRT, as you can see there was no change. I performed other tests with filtering, but had the same results.


Diffuse and Normal Shader LLL 16:
Filtering of Linear Linear Linear and max_anisotropy set to 16


Diffuse and Normal Shader AAL 16:
Filtering of Anisotropic Anisotropic Linear and max_anisotropy set to 16
There is a slight difference... the best place to look is on the top surface of the lower left missile pod.

_________________
Sign off,
Hamilton

“We used to dream about this stuff. Now, we get to build it. It's pretty neat." - Steve Jobs

[Hamilton]

The following is of the Emissive Shader

Note: Shininess is set to 25 for all images

Reference Image:
Original Diffuse, Normal and Specular Shader
The goal here is to keep the model as is, but make that blue sensor (in the middle of the missile launcher) brighter.
Filtering of Anisotropic Anisotropic Linear and max_anisotropy set to 16


Original Diffuse, Normal, Specular, Emissive Shader:
Notice that even when using an all black with a blue glow for the emissive texture file, the model is lighter overall. The Blue Glow for the sensor is there... but now the whole model is brighter!
Filtering of Anisotropic Anisotropic Linear and max_anisotropy set to 16


Diffuse, Normal, Specular, Emissive Shader w/Alpha:
So how about just making most of the Emissive Texture file transparent (Alpha Channeling)? Well this is what happened...
Filtering of Linear Linear Linear and max_anisotropy set to 16


Diffuse, Normal, Specular, Emissive Shader w/Alpha Reject:
And when plugging in the Alpha Reject 128 into the material code...
Filtering of Linear Linear Linear and max_anisotropy set to 16

But at least the sensor is a blue glow...

Modified Diffuse, Normal, Specular, Emissive Shader:
This is what happened when adjusting/fixing the Color Equation to:

[Flapman]

Very cool examples Ham. I learned a lot there. I'll have to come back to this and really try to digest it so I figure out will create the best effect for me.

Thanks for doing all that testing.

I guess what I need to figure out is how this relates to my material files and setting them up properly. Would I redo my Material Template file? Would I have templates (one for non emissive models and one for those that are)?

All in all I like the last example:
Modified Diffuse, Normal, Specular, Emissive Shader w/30% Black Overlay:

If I can make that the standard for all the models, that would be cool. I would just need to learn how.

[Hamilton]

Not a problem, I'll be providing a wiki entry of explaining and how to use the shaders. I've got the Static Mesh Shaders completed and tested, now need to test the Skinned shaders.

I have redone the DiffuseBump.cg and Multiverse.program files for better organization and of some corrections.

For example, I found out what was causing the Emissive problem and from a standard programing sense, there seems to be nothing wrong with it. What has happened is that the order of the equations of maps was not in proper order. It appears that the Emissive Map was the Diffuse Map (as well as missing the parentheses for the color equation). I can't explain it other than a mismatch of the Texture Coordinates.
Original Code in the DNSE: