Irrlicht Engine

I don't want flat shading. I switched off Gouraud shading (and thus implying flat shading?) to try to make the issue more apparent. I want the whole thing to be naturally lit, without the dark areas along the edges of the larger triangles. Originally, EMF_GOURAUD_SHADING was set to true. As you can ...

OK, so a solution would be to replace the larger triangles with smaller ones?
Or are there certain other settings that render it more evenly?

Thanks for all the suggestions so far. I'm not sure about the 'provoking vertex' though, as the problem persists with Gouraud shading on. I've gone back a bit to a previous example, and simplified it. Gouraud shading is on. The code:         #include <irrlicht.h>       using namespace irr;       #if...

Here's a video capture of what happens when moving the light (indicated by the white billboard). http://screencast.com/t/uSPRQpcQanYe The strange thing is that when the light is at the top or the bottom, the wrong triangle is brighter. When moved to the left or the right, the expected result is disp...

I've tried to investigate this further, but so far I'm not sure why the lighting is so uneven.
If anyone has an idea, I would be interested to hear about it.

As a workaround, I've moved the lights a bit further away so the effect is less obvious.

Thanks, it looks like we're getting somewhere. I've simplified it further. Just two triangles. Moving the light to the left and right of the scene seems to work as expected. Moving it up or down the scene, it seems the wrong triangle gets most of the light.   #include <irrlicht.h>   using namespace ...

Hi All. I've adjusted one of the Irrlicht samples to reproduce the problem. http://imgur.com/RTQbWD0.png Here's the full code:   #include <irrlicht.h>   using namespace irr;   #ifdef _MSC_VER #pragma comment(lib, "Irrlicht.lib") #endif     /// Class to create a 1 pixel BMP in memory class ...

@Mongoose: Thanks for the suggestion. I tried, but it makes no difference. @Mel: All the vertices are on the same plain, so no 'hills'. All have Y==0. All normals have X==Z==0, and Y==1. Here is a list of the vertices and indices of the mesh (taken from the debugger, Visual Studio 2015): Vertices:  ...

Thanks for the quick reply! The radius is large enough I think (5 * (height above the table + length + width of the table)). So according to Pythagoras, it should hit everything within 1/5th of its range. So that can't be the issue. Just now I've experimented moving the light a bit further away. Thi...

Dear all. I've been using Irrlicht for quite a while, but now I am baffled by a thing I cannot explain. I think it should be simple, hence I put it in the Beginners help. I'm working on generating a 'landscape' on a rectangular area, think of a table. Here is a picture of my problem case: http://img...