diff --git a/include/render.h b/include/render.h
index 5cc666a..02bfaaf 100644
--- a/include/render.h
+++ b/include/render.h
@@ -85,3 +85,4 @@ GLuint renderer_next_tex(struct renderer* self);
 GLuint renderer_last_tex(const struct renderer* self);
 
 void render(struct renderer* self);
+void render_damage(struct renderer* self);
diff --git a/src/render.c b/src/render.c
index 04e18dd..f6d5f9f 100644
--- a/src/render.c
+++ b/src/render.c
@@ -409,6 +409,8 @@ void gl_draw(void)
 
 void render(struct renderer* self)
 {
+	glBindFramebuffer(GL_FRAMEBUFFER, self->frame_fbo.fbo);
+
 	glActiveTexture(GL_TEXTURE0);
 	glBindTexture(self->tex_target, renderer_current_tex(self));
 	glActiveTexture(GL_TEXTURE1);
@@ -425,6 +427,26 @@ void render(struct renderer* self)
 	gl_draw();
 }
 
+void render_damage(struct renderer* self)
+{
+	glBindFramebuffer(GL_FRAMEBUFFER, self->damage_fbo.fbo);
+
+	glActiveTexture(GL_TEXTURE0);
+	glBindTexture(self->tex_target, renderer_current_tex(self));
+	glActiveTexture(GL_TEXTURE1);
+	glBindTexture(self->tex_target, renderer_last_tex(self));
+
+	glUseProgram(self->damage_shader.program);
+
+	glUniform1i(self->damage_shader.u_tex0, 0);
+	glUniform1i(self->damage_shader.u_tex1, 1);
+
+	const float* proj = transforms[self->output->transform];
+	glUniformMatrix2fv(self->damage_shader.u_proj, 1, GL_FALSE, proj);
+
+	gl_draw();
+}
+
 void destroy_fbo(struct renderer_fbo* fbo)
 {
 	glDeleteFramebuffers(1, &fbo->fbo);