I'm attempting to create a custom rendered block, which will use a model from Techne. I've got everything rendering fine, except at random intervals I enccounter a weird lighting bug. I've tried using tessellator light values, disabling lighting, and nothing works. The rendered block switches between the two images seen below - the first (darker) one is the correct one.

 

 

Here's the rendering code I have at the moment:

 

@Override
public void renderTileEntityAt(TileEntity tileentity, double d0, double d1, double d2, float f) {
TileEntityCrystal te = ((TileEntityCrystal) tileentity);
float[] components = colors[tileentity.getBlockMetadata()];

glPushMatrix(); {
	glEnable(GL_BLEND);
	glColor4f(components[0], components[1], components[2], 0.8F);

	double offsetX = (double) te.getOffsetX() / 512.0;
	double offsetZ = (double) te.getOffsetZ() / 512.0;

	glTranslated(d0 + 0.5 + offsetX, d1 + 1.5D, d2 + 0.5 + offsetZ);
	glRotatef(te.getRotation() / 255F * 360F, 0, 1, 0);
	glRotatef(180, 0F, 0F, 1F);
	this.bindTexture(texture);
	model.render(null, 0, 0, 0, 0, 0, 0.0625F, te.getDensity()); // 1/16
	glDisable(GL_BLEND);
}
glPopMatrix();
}

Any ideas?

 

PS: the black variation of the block doesn't show up at all instead of becoming brighter. I assume this is linked to the same glitch...

Hi

 

You need to set the appropriate lighting settings otherwise you will carry over from the previous object rendered.

 

The two main settings to watch out for are the item model lighting and the block lighting (multitexturing).  This link explains it a bit.

http://greyminecraftcoder.blogspot.com.au/2014/12/lighting-18.html

 

This is a TESR example in 1.8 which renders reliably (uses the Tessellator):

https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/java/minecraftbyexample/mbe21_tileentityspecialrenderer/TileEntitySpecialRendererMBE21.java

 

Some further info on the steps it uses

http://greyminecraftcoder.blogspot.co.at/2014/12/the-tessellator-and-worldrenderer-18.html

 

The classes in 1.8 are slightly different to 1.7 but the logic is identical.

 

You might also find this tool useful to find out what the opengl settings are - dumpAllIsEnabled() for a good render, dumpAllIsEnabled() for a bad render, and spot the difference.

 

https://github.com/TheGreyGhost/MinecraftByExample/blob/master/src/main/java/minecraftbyexample/usefultools/OpenGLdebugging.java

 

-TGG

 

Seems the issue is gone, turns out the issue was that I hadn't set a glBlendFunc, so I just used the usual GL_SRC_ALPHA and GL_ONE_MINUS_SRC_ALPHA and the issue appears to have disappeared. Thanks for your help, though!