Uses alpha of the first texture to make texture alpha blending
Removes old textures
Force operations of inputs to fit without output
vec3 color = input1.rgb * input2.rgba
Remove premult alpha in textureRGBA and return vec4 instead of vec3
Adds new model with texture alpha blending
Adds function getTypeID to object and prototype
Adds texture alpha to test texture blending
Copy tex coord tu use multitexture
adds a few comments