Here's my TESR class:

public class AuraPylonTESR extends TileEntitySpecialRenderer<TileAuraPylon> {

	@Override
	public void renderTileEntityFast(TileAuraPylon te, double x, double y, double z, float partialTicks, int destroyStage, VertexBuffer buffer) {
		BlockPos pos = te.getPos();
		buffer.setTranslation(pos.getX(), pos.getY() + 1, pos.getZ());
		
		buffer.pos(0, 0, 0).color(1, 1, 1, 1).tex(0, 0).lightmap(0, 0).endVertex();
		buffer.pos(0, 1, 0).color(1, 1, 1, 1).tex(0, 1).lightmap(0, 0).endVertex();
		buffer.pos(1, 1, 0).color(1, 1, 1, 1).tex(1, 1).lightmap(0, 0).endVertex();
		buffer.pos(1, 0, 0).color(1, 1, 1, 1).tex(1, 0).lightmap(0, 0).endVertex();
	}

}

But nothing ever renders. I've tried looking at my block from all angles, but I can never see anything being rendered. renderTileEntityFast() is definitely being called, because I can put System.out.println("rendering"); in renderTileEntityFast() and "rendering" is printed continually in the console. Why is nothing rendering?

I think you're translating to the wrong position.

 

AnimationTESR sets the translation to the coordinate arguments minus the TileEntity's coordinates, you're setting the translation to the TileEntity's coordinates.

Added

buffer.setTranslation(x - pos.getX(), y - pos.getY() + 1, z - pos.getZ());

Still nothing. I've looked all around and dug underneath the block and I don't see anything.

What happens if you call buffer.begin(...) before translating and adding the vertices?

Ok, sorry, didn't know that.

Bump.