Apply Bumpmapping to Q3 Level

Lambda · Post by **Lambda** » Fri Jun 19, 2009 4:40 pm

I have been trying to apply bumpmap to the Q3 example of the Irrlicht SDK without success.

I have read the PerPixelLighting example and checking how its done, i have made something similar but without success.

Does anyone have a idea to achieve this?

Katsankat · Post by **Katsankat** » Sat Jun 20, 2009 7:27 am

It is done via a Q3 shader.

Lambda · Post by **Lambda** » Sat Jun 20, 2009 3:25 pm

Katsankat wrote:It is done via a Q3 shader.

Yes i have seen that, but is a fake bumpmapping since its rendered into the lightmap, i want to make users able to enable/disable the bumpmapping from the game options.

Also, i have been testing some other things and i have got it "working" with some errors.

If i call createMeshWithTangents the lightmaps are screwed up.
I dont want to have a light in the scene to view the bumpmapped surface, if i dont put any light the surface is black.

Any ideas?

FuzzYspo0N · Post by **FuzzYspo0N** » Sat Jun 20, 2009 4:09 pm

Bumpmapping is a technique that fakes depth USING Light. You cant do it without light, unless its faked.

Try setting the materials type to be EMT_LIGHTMAP_LIGHT_ (it might be called emt_light_lightmap_) That allows lightmaps to exist, as well as allowing the light to affect the mesh still (allowing bump maps).

The most probable cause of errors is the fact that the normal map / bump shaders use a specific texture channel , and the lightmaps might be using that same channel ( 1 )

Kalango · Post by **Kalango** » Sat Jun 20, 2009 5:09 pm

Have you tried to load them on irredit and then readapting them?

Lambda · Post by **Lambda** » Sun Jun 21, 2009 6:08 pm

Kalango wrote:Have you tried to load them on irredit and then readapting them?

I Want to use the Q3 lightmaps, but well, viewing the situation i should use the fake bumpmapping from the q3map2 (wich i cant get it working :/)