workaround for OlympiaCore bug

added some minor debug code

src/main/java/mods/betterfoliage/client/misc/Double3.java

@@ -46,4 +46,9 @@ public Double3 scale(double s) {
 	public Double3 inverse() {
 		return new Double3(-x, -y, -z);
 	}
+
+	@Override
+	public String toString() {
+		return String.format("(%.2f, %.2f, %.2f)", x, y, z);
+	}
 }

src/main/java/mods/betterfoliage/client/render/RenderBlockAOBase.java

@@ -43,14 +43,21 @@ public static class ShadingValues {
 		public float red;
 		public float green;
 		public float blue;
+
 		public void setGray(float value) {
 			red = value; green = value; blue = value;
 		}
+
 		public void setColor(int value) {
 			red = ((value >> 16) & 0xFF) / 256.0f;
 			green = ((value >> 8) & 0xFF) / 256.0f;
 			blue = (value & 0xFF) / 256.0f;
 		}
+
+		@Override
+		public String toString() {
+			return String.format("Br(%d, %d, %d), Col(%.2f, %.2f, %.2f)", (brightness >> 16) & 0xFF, (brightness >> 8) & 0xFF, (brightness & 0xFF), red, green, blue);
+		}
 	}
 
 	protected int drawPass = 0;
@@ -207,7 +214,7 @@ protected void renderWorldBlockBase(int pass, IBlockAccess world, int x, int y,
 		setAOPassCounters(pass);
 		setRenderBoundsFromBlock(block);
 		ISimpleBlockRenderingHandler handler = RenderUtils.getRenderingHandler(block.getRenderType());
-		if (handler != null) {
+		if (handler != null && block.getRenderType() != 0) {
 			handler.renderWorldBlock(world, x, y, z, block, block.getRenderType(), this);
 		} else {
 			renderStandardBlock(block, x, y, z);