kinda separate system capability stuff, should probably clean this up more.

fix lighting glitches on world load.

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/AbstractContraptionEntityRenderer.java

@@ -1,6 +1,7 @@
 package com.simibubi.create.content.contraptions.components.structureMovement;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
+import com.simibubi.create.foundation.render.backend.Backend;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
 import com.simibubi.create.foundation.utility.AnimationTickHolder;
 import net.minecraft.client.renderer.IRenderTypeBuffer;
@@ -56,11 +57,12 @@ public abstract class AbstractContraptionEntityRenderer<C extends AbstractContra
 		transform(entity, partialTicks, matrixStacks);
 		Contraption contraption = entity.getContraption();
 		if (contraption != null) {
-			if (!FastRenderDispatcher.available()) {
+			if (Backend.canUseVBOs()) {
-				ContraptionRenderer.render(entity.world, contraption, ms, msLocal, buffers);
-			} else {
 				ContraptionRenderer.renderDynamic(entity.world, contraption, ms, msLocal, buffers);
 			}
+			else {
+				ContraptionRenderer.render(entity.world, contraption, ms, msLocal, buffers);
+			}
 		}
 		ms.pop();
 

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/ContraptionRenderer.java

@@ -5,6 +5,7 @@ import java.util.Random;
 
 import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
 import com.simibubi.create.foundation.render.*;
+import com.simibubi.create.foundation.render.backend.Backend;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
 import org.apache.commons.lang3.tuple.Pair;
 import org.lwjgl.opengl.GL11;
@@ -75,7 +76,7 @@ public class ContraptionRenderer {
 
 	protected static void renderTileEntities(World world, Contraption c, MatrixStack ms, MatrixStack msLocal,
 		IRenderTypeBuffer buffer) {
-		if (FastRenderDispatcher.available()) {
+		if (Backend.canUseVBOs()) {
 			ContraptionRenderDispatcher.renderTileEntities(world, c, ms, msLocal, buffer);
 		} else {
 			TileEntityRenderHelper.renderTileEntities(world, c.maybeInstancedTileEntities, ms, msLocal, buffer);

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/render/ContraptionRenderDispatcher.java

@@ -34,10 +34,6 @@ import java.util.Map;
 public class ContraptionRenderDispatcher {
     public static final HashMap<Integer, RenderedContraption> renderers = new HashMap<>();
 
-    public static void markForRendering(Contraption c, MatrixStack model) {
-        getRenderer(c.entity.world, c).setRenderSettings(model.peek().getModel());
-    }
-
     public static void notifyLightUpdate(ILightReader world, LightType type, SectionPos pos) {
         for (RenderedContraption renderer : renderers.values()) {
             renderer.getLighter().lightVolume.notifyLightUpdate(world, type, pos);
@@ -73,7 +69,8 @@ public class ContraptionRenderDispatcher {
     private static <C extends AbstractContraptionEntity> void updateTransform(C c, AbstractContraptionEntityRenderer<C> entityRenderer) {
         MatrixStack stack = entityRenderer.makeTransformMatrix(c, AnimationTickHolder.getPartialTicks());
 
-        markForRendering(c.getContraption(), stack);
+        Contraption c1 = c.getContraption();
+        getRenderer(c1.entity.world, c1).setRenderSettings(stack.peek().getModel());
     }
 
     public static void tick() {
@@ -104,15 +101,19 @@ public class ContraptionRenderDispatcher {
         GL11.glEnable(GL13.GL_TEXTURE_3D);
         GL13.glActiveTexture(GL40.GL_TEXTURE4); // the shaders expect light volumes to be in texture 4
 
-        ContraptionProgram structureShader = Backend.getProgram(AllProgramSpecs.CONTRAPTION_STRUCTURE);
+        if (Backend.canUseVBOs()) {
-        structureShader.bind(viewProjection, camX, camY, camZ, FastRenderDispatcher.getDebugMode());
+            ContraptionProgram structureShader = Backend.getProgram(AllProgramSpecs.CONTRAPTION_STRUCTURE);
-        for (RenderedContraption renderer : renderers.values()) {
+            structureShader.bind(viewProjection, camX, camY, camZ, FastRenderDispatcher.getDebugMode());
-            renderer.doRenderLayer(layer, structureShader);
+            for (RenderedContraption renderer : renderers.values()) {
+                renderer.doRenderLayer(layer, structureShader);
+            }
         }
 
-        for (RenderedContraption renderer : renderers.values()) {
+        if (Backend.canUseInstancing()) {
-            renderer.kinetics.render(layer, viewProjection, camX, camY, camZ, renderer::setup);
+            for (RenderedContraption renderer : renderers.values()) {
-            renderer.teardown();
+                renderer.kinetics.render(layer, viewProjection, camX, camY, camZ, renderer::setup);
+                renderer.teardown();
+            }
         }
 
         layer.endDrawing();

src/main/java/com/simibubi/create/content/contraptions/components/structureMovement/render/RenderedContraption.java

@@ -6,6 +6,7 @@ import com.simibubi.create.content.contraptions.base.KineticRenderMaterials;
 import com.simibubi.create.content.contraptions.components.structureMovement.Contraption;
 import com.simibubi.create.content.contraptions.components.structureMovement.MovementBehaviour;
 import com.simibubi.create.content.contraptions.components.structureMovement.MovementContext;
+import com.simibubi.create.foundation.render.backend.Backend;
 import com.simibubi.create.foundation.render.backend.instancing.*;
 import com.simibubi.create.content.contraptions.components.actors.ContraptionActorData;
 import com.simibubi.create.content.contraptions.components.structureMovement.ContraptionLighter;
@@ -52,8 +53,10 @@ public class RenderedContraption {
         this.renderWorld = setupRenderWorld(world, contraption);
 
         buildLayers();
-        buildInstancedTiles();
+        if (Backend.canUseInstancing()) {
-        buildActors();
+            buildInstancedTiles();
+            buildActors();
+        }
     }
 
     public int getEntityId() {

src/main/java/com/simibubi/create/foundation/command/ConfigureConfigPacket.java

@@ -84,8 +84,9 @@ public class ConfigureConfigPacket extends SimplePacketBase {
 
 		@OnlyIn(Dist.CLIENT)
 		private static void experimentalRendering(String value) {
-			boolean last = AllConfigs.CLIENT.experimentalRendering.get();
+			if (!"".equals(value)) {
-			AllConfigs.CLIENT.experimentalRendering.set(Boolean.parseBoolean(value));
+				AllConfigs.CLIENT.experimentalRendering.set(Boolean.parseBoolean(value));
+			}
 			FastRenderDispatcher.refresh();
 		}
 		

src/main/java/com/simibubi/create/foundation/config/CClient.java

@@ -15,8 +15,8 @@ public class CClient extends ConfigBase {
 	public ConfigBool rainbowDebug =
 		b(true, "enableRainbowDebug", "Show colourful debug information while the F3-Menu is open.");
 
-	public ConfigRender experimentalRendering =
+	public ConfigBool experimentalRendering =
-		new ConfigRender("experimentalRendering", true, "Use modern OpenGL features to drastically increase performance.");
+		b(true, "experimentalRendering", "Use modern OpenGL features to drastically increase performance.");
 
 	public ConfigInt overlayOffsetX = i(20, Integer.MIN_VALUE, Integer.MAX_VALUE, "overlayOffsetX", "Offset the overlay from goggle- and hover- information by this many pixels on the X axis; Use /create overlay");
 	public ConfigInt overlayOffsetY = i(0, Integer.MIN_VALUE, Integer.MAX_VALUE, "overlayOffsetY", "Offset the overlay from goggle- and hover- information by this many pixels on the Y axis; Use /create overlay");
@@ -25,27 +25,4 @@ public class CClient extends ConfigBase {
 	public String getName() {
 		return "client";
 	}
-
-	public class ConfigRender extends ConfigBool {
-
-		public ConfigRender(String name, boolean def, String... comment) {
-			super(name, def, comment);
-		}
-
-		/**
-		 * Gets the configured value and checks if the rendering is actually supported.
-		 * @return True if fast rendering is enabled and the current system/configuration is capable.
-		 */
-		@Override
-		public Boolean get() {
-			return super.get() && Backend.canUse();
-		}
-
-		@Override
-		public void set(Boolean value) {
-			super.set(value);
-			Backend.enabled = get();
-		}
-	}
-
 }

src/main/java/com/simibubi/create/foundation/mixin/LightUpdateMixin.java

@@ -1,10 +1,13 @@
 package com.simibubi.create.foundation.mixin;
 
-import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
+import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
+import com.simibubi.create.foundation.render.backend.light.ILightListener;
 import net.minecraft.client.multiplayer.ClientChunkProvider;
 import net.minecraft.util.math.SectionPos;
+import net.minecraft.world.ILightReader;
 import net.minecraft.world.LightType;
 import net.minecraft.world.chunk.AbstractChunkProvider;
+import net.minecraft.world.chunk.Chunk;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
 import org.spongepowered.asm.mixin.Mixin;
@@ -12,6 +15,8 @@ import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
 
+import java.util.Map;
+
 @OnlyIn(Dist.CLIENT)
 @Mixin(ClientChunkProvider.class)
 public abstract class LightUpdateMixin extends AbstractChunkProvider {
@@ -24,6 +29,23 @@ public abstract class LightUpdateMixin extends AbstractChunkProvider {
      */
     @Inject(at = @At("HEAD"), method = "markLightChanged")
     private void onLightUpdate(LightType type, SectionPos pos, CallbackInfo ci) {
-        FastRenderDispatcher.notifyLightUpdate(((ClientChunkProvider) (Object) this), type, pos);
+        ClientChunkProvider thi = ((ClientChunkProvider) (Object) this);
+
+        Chunk chunk = thi.getChunk(pos.getSectionX(), pos.getSectionZ(), false);
+
+        int sectionY = pos.getSectionY();
+
+        if (chunk != null) {
+            chunk.getTileEntityMap()
+                 .entrySet()
+                 .stream()
+                 .filter(entry -> SectionPos.toChunk(entry.getKey().getY()) == sectionY)
+                 .map(Map.Entry::getValue)
+                 .filter(tile -> tile instanceof ILightListener)
+                 .map(tile -> (ILightListener) tile)
+                 .forEach(ILightListener::onChunkLightUpdate);
+        }
+
+        ContraptionRenderDispatcher.notifyLightUpdate((ILightReader) thi.getWorld(), type, pos);
     }
 }

src/main/java/com/simibubi/create/foundation/mixin/RenderInLayerMixin.java

@@ -1,11 +1,16 @@
 package com.simibubi.create.foundation.mixin;
 
 import com.mojang.blaze3d.matrix.MatrixStack;
+import com.simibubi.create.content.contraptions.components.structureMovement.render.ContraptionRenderDispatcher;
+import com.simibubi.create.foundation.render.backend.Backend;
 import com.simibubi.create.foundation.render.backend.FastRenderDispatcher;
+import com.simibubi.create.foundation.render.backend.OptifineHandler;
+import net.minecraft.client.renderer.Matrix4f;
 import net.minecraft.client.renderer.RenderType;
 import net.minecraft.client.renderer.WorldRenderer;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
+import org.lwjgl.opengl.GL20;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
@@ -21,7 +26,21 @@ public class RenderInLayerMixin {
      * This should probably be a forge event.
      */
     @Inject(at = @At(value = "TAIL"), method = "renderLayer")
-    private void renderLayer(RenderType type, MatrixStack stack, double cameraX, double cameraY, double cameraZ, CallbackInfo ci) {
+    private void renderLayer(RenderType type, MatrixStack stack, double camX, double camY, double camZ, CallbackInfo ci) {
-        FastRenderDispatcher.renderLayer(type, stack, (float) cameraX, (float) cameraY, (float) cameraZ);
+        if (!Backend.available()) return;
+
+        float cameraX = (float) camX;
+        float cameraY = (float) camY;
+        float cameraZ = (float) camZ;
+
+        Matrix4f viewProjection = Matrix4f.translate(-cameraX, -cameraY, -cameraZ);
+        viewProjection.multiplyBackward(stack.peek().getModel());
+        viewProjection.multiplyBackward(FastRenderDispatcher.getProjectionMatrix());
+
+        FastRenderDispatcher.renderLayer(type, viewProjection, cameraX, cameraY, cameraZ);
+
+        ContraptionRenderDispatcher.renderLayer(type, viewProjection, cameraX, cameraY, cameraZ);
+
+        GL20.glUseProgram(0);
     }
 }

src/main/java/com/simibubi/create/foundation/render/backend/Backend.java

@@ -17,7 +17,6 @@ import net.minecraftforge.resource.ISelectiveResourceReloadListener;
 import net.minecraftforge.resource.VanillaResourceType;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
-import org.lwjgl.opengl.ARBVertexProgram;
 import org.lwjgl.opengl.GL;
 import org.lwjgl.opengl.GLCapabilities;
 import org.lwjgl.system.MemoryUtil;
@@ -42,10 +41,9 @@ public class Backend {
     private static final Map<ResourceLocation, ProgramSpec<?>> registry = new HashMap<>();
     private static final Map<ProgramSpec<?>, GlProgram> programs = new HashMap<>();
 
-    public static boolean enabled;
+    private static boolean enabled;
 
     public static GLCapabilities capabilities;
-    private static SystemCapability capability;
     private static MapBuffer mapBuffer;
 
     public Backend() {
@@ -102,16 +100,24 @@ public class Backend {
         return Arrays.stream(constants).filter(it -> it.supported(caps)).findFirst().orElse(last);
     }
 
-    public static boolean canUse() {
+    public static boolean canUseInstancing() {
-        return isCapable() && !OptifineHandler.usingShaders();
+        return enabled && gl33();
     }
 
-    public static SystemCapability getCapability() {
+    public static boolean canUseVBOs() {
-        return capability;
+        return enabled && gl20();
     }
 
-    public static boolean isCapable() {
+    public static boolean available() {
-        return capability.isCapable();
+        return enabled && gl20();
+    }
+
+    public static boolean gl33() {
+        return capabilities.OpenGL33;
+    }
+
+    public static boolean gl20() {
+        return capabilities.OpenGL20;
     }
 
     public static void init() {
@@ -132,9 +138,10 @@ public class Backend {
             capabilities = GL.createCapabilities();
             mapBuffer = getLatest(MapBuffer.class);
 
+            OptifineHandler.refresh();
             refresh();
 
-            if (isCapable()) {
+            if (gl20()) {
 
                 programs.values().forEach(GlProgram::delete);
                 programs.clear();
@@ -146,13 +153,7 @@ public class Backend {
     }
 
     public static void refresh() {
-        if (capabilities.OpenGL33) {
+        enabled = AllConfigs.CLIENT.experimentalRendering.get() && !OptifineHandler.usingShaders();
-            capability = SystemCapability.CAPABLE;
-        } else {
-            capability = SystemCapability.INCAPABLE;
-        }
-
-        enabled = AllConfigs.CLIENT.experimentalRendering.get();
     }
 
     private static <P extends GlProgram, S extends ProgramSpec<P>> void loadProgram(IResourceManager manager, S programSpec) {

src/main/java/com/simibubi/create/foundation/render/backend/FastRenderDispatcher.java

@@ -30,6 +30,7 @@ import net.minecraft.world.World;
 import net.minecraft.world.chunk.Chunk;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.GL20;
+import org.lwjgl.system.CallbackI;
 
 import javax.annotation.Nullable;
 import java.util.ArrayList;
@@ -40,7 +41,7 @@ import java.util.function.Consumer;
 public class FastRenderDispatcher {
 
     public static WorldAttached<ConcurrentHashMap.KeySetView<TileEntity, Boolean>> queuedUpdates = new WorldAttached<>(ConcurrentHashMap::newKeySet);
-    public static WorldAttached<ConcurrentHashMap.KeySetView<TileEntity, Boolean>> addedLastTick = new WorldAttached<>(ConcurrentHashMap::newKeySet);
+    public static WorldAttached<ConcurrentHashMap<TileEntity, Integer>> addedLastTick = new WorldAttached<>(ConcurrentHashMap::new);
 
     private static Matrix4f projectionMatrixThisFrame = null;
 
@@ -55,18 +56,36 @@ public class FastRenderDispatcher {
     public static void tick() {
         ClientWorld world = Minecraft.getInstance().world;
 
-        runQueue(addedLastTick.get(world), CreateClient.kineticRenderer::onLightUpdate);
+        // Clean up twice a second. This doesn't have to happen every tick,
-        CreateClient.kineticRenderer.clean();
+        // but this does need to be run to ensure we don't miss anything.
+        int ticks = AnimationTickHolder.getTicks();
+
+        ConcurrentHashMap<TileEntity, Integer> map = addedLastTick.get(world);
+        map
+                .entrySet()
+                .stream()
+                .filter(it -> ticks - it.getValue() > 10)
+                .map(Map.Entry::getKey)
+                .forEach(te -> {
+                    map.remove(te);
+
+                    CreateClient.kineticRenderer.onLightUpdate(te);
+                });
+
+
+        if (ticks % 10 == 0) {
+            CreateClient.kineticRenderer.clean();
+        }
 
         runQueue(queuedUpdates.get(world), CreateClient.kineticRenderer::update);
     }
 
     public static boolean available() {
-        return Backend.enabled;
+        return Backend.canUseInstancing();
     }
 
     public static boolean available(World world) {
-        return Backend.enabled && !(world instanceof SchematicWorld);
+        return Backend.canUseInstancing() && !(world instanceof SchematicWorld);
     }
 
     public static int getDebugMode() {
@@ -77,6 +96,7 @@ public class FastRenderDispatcher {
         RenderWork.enqueue(() -> {
             CreateClient.kineticRenderer.invalidate();
             OptifineHandler.refresh();
+            Backend.refresh();
             Minecraft.getInstance().worldRenderer.loadRenderers();
             ClientWorld world = Minecraft.getInstance().world;
             if (world != null) world.loadedTileEntityList.forEach(CreateClient.kineticRenderer::add);
@@ -97,12 +117,8 @@ public class FastRenderDispatcher {
         }
     }
 
-    public static void renderLayer(RenderType layer, MatrixStack stack, float cameraX, float cameraY, float cameraZ) {
+    public static void renderLayer(RenderType layer, Matrix4f viewProjection, float cameraX, float cameraY, float cameraZ) {
-        if (!available()) return;
+        if (!Backend.canUseInstancing()) return;
-
-        Matrix4f viewProjection = Matrix4f.translate(-cameraX, -cameraY, -cameraZ);
-        viewProjection.multiplyBackward(stack.peek().getModel());
-        viewProjection.multiplyBackward(getProjectionMatrix());
 
         layer.startDrawing();
 
@@ -113,31 +129,9 @@ public class FastRenderDispatcher {
         RenderSystem.disableCull();
         //RenderSystem.disableDepthTest();
 
-        ContraptionRenderDispatcher.renderLayer(layer, viewProjection, cameraX, cameraY, cameraZ);
-        if (!OptifineHandler.usingShaders())
-            GL20.glUseProgram(0);
         layer.endDrawing();
     }
 
-    public static void notifyLightUpdate(ClientChunkProvider world, LightType type, SectionPos pos) {
-        ContraptionRenderDispatcher.notifyLightUpdate((ILightReader) world.getWorld(), type, pos);
-
-        Chunk chunk = world.getChunk(pos.getSectionX(), pos.getSectionZ(), false);
-
-        int sectionY = pos.getSectionY();
-
-        if (chunk != null) {
-            chunk.getTileEntityMap()
-                 .entrySet()
-                 .stream()
-                 .filter(entry -> SectionPos.toChunk(entry.getKey().getY()) == sectionY)
-                 .map(Map.Entry::getValue)
-                 .filter(tile -> tile instanceof ILightListener)
-                 .map(tile -> (ILightListener) tile)
-                 .forEach(ILightListener::onChunkLightUpdate);
-        }
-    }
-
     // copied from GameRenderer.renderWorld
     public static Matrix4f getProjectionMatrix() {
         if (projectionMatrixThisFrame != null) return projectionMatrixThisFrame;

src/main/java/com/simibubi/create/foundation/render/backend/SystemCapability.java

@@ -1,19 +0,0 @@
-package com.simibubi.create.foundation.render.backend;
-
-public enum SystemCapability {
-    /**
-     * The current system does not support enough
-     * OpenGL features to enable fast rendering.
-     */
-    INCAPABLE,
-
-    /**
-     * The current system supports OpenGL 3.3.
-     */
-    CAPABLE,
-    ;
-
-    public boolean isCapable() {
-        return this == CAPABLE;
-    }
-}

src/main/java/com/simibubi/create/foundation/render/backend/instancing/InstancedTileRenderer.java

@@ -37,7 +37,7 @@ public abstract class InstancedTileRenderer<P extends BasicProgram> {
     @SuppressWarnings("unchecked")
     @Nullable
     public <T extends TileEntity> TileEntityInstance<? super T> getInstance(T tile, boolean create) {
-        if (!Backend.enabled) return null;
+        if (!Backend.canUseInstancing()) return null;
 
         TileEntityInstance<?> instance = instances.get(tile);
 
@@ -47,7 +47,7 @@ public abstract class InstancedTileRenderer<P extends BasicProgram> {
             TileEntityInstance<? super T> renderer = InstancedTileRenderRegistry.instance.create(this, tile);
 
             if (renderer != null) {
-                FastRenderDispatcher.addedLastTick.get(tile.getWorld()).add(tile);
+                FastRenderDispatcher.addedLastTick.get(tile.getWorld()).put(tile, AnimationTickHolder.getTicks());
                 instances.put(tile, renderer);
             }
 
@@ -93,11 +93,7 @@ public abstract class InstancedTileRenderer<P extends BasicProgram> {
     }
 
     public void clean() {
-        // Clean up twice a second. This doesn't have to happen every tick,
+        instances.keySet().stream().filter(TileEntity::isRemoved).forEach(instances::remove);
-        // but this does need to be run to ensure we don't miss anything.
-        if (AnimationTickHolder.getTicks() % 10 == 0) {
-            instances.keySet().stream().filter(TileEntity::isRemoved).forEach(instances::remove);
-        }
     }
 
     public void invalidate() {