diff --git a/src/common/rendering/gles/gles_renderstate.cpp b/src/common/rendering/gles/gles_renderstate.cpp
index 76718f6490..910c7ae20e 100644
--- a/src/common/rendering/gles/gles_renderstate.cpp
+++ b/src/common/rendering/gles/gles_renderstate.cpp
@@ -32,6 +32,7 @@
 #include "gles_shader.h"
 #include "gles_renderer.h"
 #include "hw_lightbuffer.h"
+#include "hw_bonebuffer.h"
 #include "gles_renderbuffers.h"
 #include "gles_hwtexture.h"
 #include "gles_buffers.h"
@@ -251,6 +252,7 @@ bool FGLRenderState::ApplyShader()
 	activeShader->cur->muTimer.Set((double)(screen->FrameTime - firstFrame) * (double)mShaderTimer / 1000.);
 	activeShader->cur->muAlphaThreshold.Set(mAlphaThreshold);
 	activeShader->cur->muClipSplit.Set(mClipSplit);
+	activeShader->cur->muBoneIndexBase.Set(-1);
 	activeShader->cur->muSpecularMaterial.Set(mGlossiness, mSpecularLevel);
 	activeShader->cur->muAddColor.Set(mStreamData.uAddColor);
 	activeShader->cur->muTextureAddColor.Set(mStreamData.uTextureAddColor);
@@ -349,6 +351,9 @@ bool FGLRenderState::ApplyShader()
 		activeShader->cur->muLightRange.Set(range);
 	}
 
+	int index = mBoneIndexBase;
+	activeShader->cur->muBoneIndexBase.Set(index);
+
 	return true;
 }
 
diff --git a/src/common/rendering/gles/gles_renderstate.h b/src/common/rendering/gles/gles_renderstate.h
index 4dd8516ecc..ed035d0f13 100644
--- a/src/common/rendering/gles/gles_renderstate.h
+++ b/src/common/rendering/gles/gles_renderstate.h
@@ -66,6 +66,7 @@ class FGLRenderState final : public FRenderState
 	int lastTranslation = 0;
 	int maxBoundMaterial = -1;
 	size_t mLastMappedLightIndex = SIZE_MAX;
+	size_t mLastMappedBoneIndexBase = SIZE_MAX;
 
 	IVertexBuffer *mCurrentVertexBuffer;
 	int mCurrentVertexOffsets[2];	// one per binding point
diff --git a/src/common/rendering/gles/gles_shader.cpp b/src/common/rendering/gles/gles_shader.cpp
index daba34f6d1..bbb97d09c6 100644
--- a/src/common/rendering/gles/gles_shader.cpp
+++ b/src/common/rendering/gles/gles_shader.cpp
@@ -38,6 +38,7 @@
 #include "shaderuniforms.h"
 #include "hw_viewpointuniforms.h"
 #include "hw_lightbuffer.h"
+#include "hw_bonebuffer.h"
 #include "i_specialpaths.h"
 #include "printf.h"
 #include "version.h"
@@ -321,6 +322,12 @@ bool FShader::Load(const char * name, const char * vert_prog_lump_, const char *
 		// dynamic lights
 		uniform ivec4 uLightRange;
 
+		// bone animation
+		uniform int uBoneIndexBase;
+
+		// bone matrix buffers
+		uniform mat4 bones[NUM_UBO_BONES];
+
 		// Blinn glossiness and specular level
 		uniform vec2 uSpecularMaterial;
 
@@ -391,10 +398,11 @@ bool FShader::Load(const char * name, const char * vert_prog_lump_, const char *
 	FString vp_comb;
 
 	assert(screen->mLights != NULL);
+	assert(screen->mBones != NULL);
 
 	unsigned int lightbuffersize = screen->mLights->GetBlockSize();
 
-	vp_comb.Format("#version 100\n#define NUM_UBO_LIGHTS %d\n#define NO_CLIPDISTANCE_SUPPORT\n", lightbuffersize);
+	vp_comb.Format("#version 100\n#define NUM_UBO_LIGHTS %d\n#define NO_CLIPDISTANCE_SUPPORT\n#define NUM_UBO_BONES %d\n", lightbuffersize, screen->mBones->GetBlockSize());
 
 	FString fp_comb = vp_comb;
 	vp_comb << defines << i_data.GetChars();
@@ -529,6 +537,8 @@ bool FShader::Load(const char * name, const char * vert_prog_lump_, const char *
 		glBindAttribLocation(shaderData->hShader, VATTR_VERTEX2, "aVertex2");
 		glBindAttribLocation(shaderData->hShader, VATTR_NORMAL, "aNormal");
 		glBindAttribLocation(shaderData->hShader, VATTR_NORMAL2, "aNormal2");
+		glBindAttribLocation(shaderData->hShader, VATTR_BONEWEIGHT, "aBoneWeight");
+		glBindAttribLocation(shaderData->hShader, VATTR_BONESELECTOR, "aBoneSelector");
 
 
 		glLinkProgram(shaderData->hShader);
@@ -591,6 +601,7 @@ bool FShader::Load(const char * name, const char * vert_prog_lump_, const char *
 	shaderData->muLightParms.Init(shaderData->hShader, "uLightAttr");
 	shaderData->muClipSplit.Init(shaderData->hShader, "uClipSplit");
 	shaderData->muLightRange.Init(shaderData->hShader, "uLightRange");
+	shaderData->muBoneIndexBase.Init(shaderData->hShader, "uBoneIndexBase");
 	shaderData->muFogColor.Init(shaderData->hShader, "uFogColor");
 	shaderData->muDynLightColor.Init(shaderData->hShader, "uDynLightColor");
 	shaderData->muObjectColor.Init(shaderData->hShader, "uObjectColor");
diff --git a/src/common/rendering/gles/gles_shader.h b/src/common/rendering/gles/gles_shader.h
index 72a242c1ba..217a8600f5 100644
--- a/src/common/rendering/gles/gles_shader.h
+++ b/src/common/rendering/gles/gles_shader.h
@@ -327,6 +327,7 @@ public: class ShaderVariantData
 		FBufferedUniform4f muLightParms;
 		FBufferedUniform2f muClipSplit;
 		FBufferedUniform4i muLightRange;
+		FBufferedUniform1i muBoneIndexBase;
 		FBufferedUniformPE muFogColor;
 		FBufferedUniform4f muDynLightColor;
 		FBufferedUniformPE muObjectColor;
diff --git a/wadsrc/static/shaders_gles/glsl/main.vp b/wadsrc/static/shaders_gles/glsl/main.vp
index 9d78e38a1f..a3f877bc20 100644
--- a/wadsrc/static/shaders_gles/glsl/main.vp
+++ b/wadsrc/static/shaders_gles/glsl/main.vp
@@ -10,6 +10,8 @@ varying vec4 vColor;
 attribute vec4 aVertex2;
 attribute vec4 aNormal;
 attribute vec4 aNormal2;
+attribute vec4 aBoneWeight;
+attribute vec4 aBoneSelector;
 
 varying vec4 pixelpos;
 varying vec3 glowdist;
@@ -23,15 +25,25 @@ varying vec4 ClipDistanceA;
 varying vec4 ClipDistanceB;
 #endif
 
+struct BonesResult
+{
+	vec3 Normal;
+	vec4 Position;
+};
+
+BonesResult ApplyBones();
+
 void main()
 {
 	float ClipDistance0, ClipDistance1, ClipDistance2, ClipDistance3, ClipDistance4;
 
 	vec2 parmTexCoord;
 	vec4 parmPosition;
+
+	BonesResult bones = ApplyBones();
 	
 	parmTexCoord = aTexCoord;
-	parmPosition = aPosition;
+	parmPosition = bones.Position;
 	
 	#ifndef SIMPLE
 		vec4 worldcoord = ModelMatrix * mix(parmPosition, aVertex2, uInterpolationFactor);
@@ -78,14 +90,7 @@ void main()
 			ClipDistance4 = worldcoord.y - ((uSplitBottomPlane.w + uSplitBottomPlane.x * worldcoord.x + uSplitBottomPlane.y * worldcoord.z) * uSplitBottomPlane.z);
 		}
 
-		#ifdef HAS_UNIFORM_VERTEX_DATA
-			if ((useVertexData & 2) == 0)
-				vWorldNormal = NormalModelMatrix * vec4(uVertexNormal.xyz, 1.0);
-			else
-				vWorldNormal = NormalModelMatrix * vec4(normalize(mix(aNormal.xyz, aNormal2.xyz, uInterpolationFactor)), 1.0);
-		#else
-			vWorldNormal = NormalModelMatrix * vec4(normalize(mix(aNormal.xyz, aNormal2.xyz, uInterpolationFactor)), 1.0);
-		#endif
+		vWorldNormal = NormalModelMatrix * vec4(normalize(bones.Normal), 1.0);
 		vEyeNormal = NormalViewMatrix * vWorldNormal;
 	#endif
 	
@@ -129,3 +134,66 @@ void main()
 
 	gl_Position = ProjectionMatrix * eyeCoordPos;
 }
+
+#if !defined(SIMPLE)
+vec3 GetAttrNormal()
+{
+	#ifdef HAS_UNIFORM_VERTEX_DATA
+		if ((useVertexData & 2) == 0)
+			return uVertexNormal.xyz;
+		else
+			return mix(aNormal.xyz, aNormal2.xyz, uInterpolationFactor);
+	#else
+		return mix(aNormal.xyz, aNormal2.xyz, uInterpolationFactor);
+	#endif
+}
+
+void AddWeightedBone(int boneIndex, float weight, inout vec4 position, inout vec3 normal)
+{
+	if (weight != 0.0)
+	{
+		mat4 transform = bones[uBoneIndexBase + boneIndex];
+		mat3 rotation = mat3(transform);
+		position += (transform * aPosition) * weight;
+		normal += (rotation * aNormal.xyz) * weight;
+	}
+}
+
+BonesResult ApplyBones()
+{
+	BonesResult result;
+	if (uBoneIndexBase >= 0 && aBoneWeight != vec4(0.0))
+	{
+		result.Position = vec4(0.0);
+		result.Normal = vec3(0.0);
+
+		// We use low precision input for our bone weights. Rescale so the sum still is 1.0
+		float totalWeight = aBoneWeight.x + aBoneWeight.y + aBoneWeight.z + aBoneWeight.w;
+		float weightMultiplier = 1.0 / totalWeight;
+		vec4 boneWeight = aBoneWeight * weightMultiplier;
+
+		AddWeightedBone(int(aBoneSelector.x), boneWeight.x, result.Position, result.Normal);
+		AddWeightedBone(int(aBoneSelector.y), boneWeight.y, result.Position, result.Normal);
+		AddWeightedBone(int(aBoneSelector.z), boneWeight.z, result.Position, result.Normal);
+		AddWeightedBone(int(aBoneSelector.w), boneWeight.w, result.Position, result.Normal);
+
+		result.Position.w = 1.0; // For numerical stability
+	}
+	else
+	{
+		result.Position = aPosition;
+		result.Normal = GetAttrNormal();
+	}
+	return result;
+}
+
+#else
+
+BonesResult ApplyBones()
+{
+	BonesResult result;
+	result.Position = aPosition;
+	return result;
+}
+
+#endif