Skaertev

Im trying to render a shader, binding everything and setting the uniforms seems to be working fine (keep in mind i setup my own shader environment since im using a simple blur and minecrafts shader system confuses me). My problem is that whenever i try to draw my shader onto my framebuffer i just get a white screen and the console gives me a OpenGL Error (to be exact: OpenGL API ERROR: 1282 (GL_INVALID_OPERATION error generated. Array object is not active.)) It also tells me that my mistake is on the line where i do: "tesselator.end();", meaning that the drawing of the tesselator seems to wrong. Thats how im currently trying to draw: Tesselator tesselator = Tesselator.getInstance(); BufferBuilder bufferBuilder = tesselator.getBuilder(); GlStateManager._bindTexture(framebuffer.getFramebuffer().texture()); bufferBuilder.begin(VertexFormat.Mode.QUADS, DefaultVertexFormat.POSITION_TEX); bufferBuilder.vertex(0f, height, 0f).uv(0f, 1f).endVertex(); bufferBuilder.vertex(width, height, 0f).uv(1f, 1f).endVertex(); bufferBuilder.vertex(width, 0, 0f).uv(1f, 0f).endVertex(); bufferBuilder.vertex(0f, 0f, 0f).uv(0f, 1f).endVertex(); tesselator.end(); Hope someone can help me, if there are any questions lmk!