Parallax Mapping mit OpenGL

porcus · Post by **porcus** » Mon Nov 19, 2007 5:17 pm

I noticed, that there are problems with Parallax Mapping and OpenGL.
If I choose the OpenGl driver the Parallax Map isn't showed like with
DirectX. The surface is flatter then in DirectX.
Is there any way to correct this?

hey_i_am_real · Post by **hey_i_am_real** » Mon Nov 19, 2007 7:55 pm

Could you show us a capture please ?

I remember last year, I encountered a similar "bug".
If I recall correctly, it was related to the alpha channel of a texture that was handled differently by the OpenGL driver of the engine ...

hybrid · Post by **hybrid** » Mon Nov 19, 2007 8:42 pm

Well, it's a known bug. But none of the shader guys did post a fix, yet.

hey_i_am_real · Post by **hey_i_am_real** » Tue Nov 20, 2007 9:14 am

There was a workaround though, because I remember I managed to get the parallax working. (a simple texture conversion if I recall)

Then, I noticed there was a problem with fog when shaders were used, and I submitted a patch proposal.

Unfortunately, I can't test shaders on this computer ...

porcus · Post by **porcus** » Tue Nov 20, 2007 8:16 pm

So, heres the screenshot:

I hope someone has an idea how to fix this.

TheGameMaker · Post by **TheGameMaker** » Tue Nov 20, 2007 8:58 pm

i did a small change to my Bumpmappingshader, that made a Parallax shader outo' it.. (the difference is pretty small..) Have to have a look wether I still have it.

porcus · Post by **porcus** » Tue Nov 20, 2007 9:10 pm

@The Game Maker:
I've already saw your shader at irrlicht3d.de, but what do I have to change,
that the shader will became a Parallax Shader ?